Ice Age Floods National Geologic Trail
Home·Ice-rafted erratics

Ice-rafted erratics

Boulders the floods carried hundreds of miles, granite from the Idaho Batholith, quartzite from northern Washington, gabbro from the Belt Supergroup. Each is a depth gauge for a single flood event.

~400
cataloged erratics
360 ft
highest stranding, ASL
~400 mi
farthest carried
1929
Piper survey
Lithology
Elevation
Sorted by elevation ↓
UNKNOWN827 ft
Ice-Rafted Boulder Site 274, 827 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN599 ft
Ice-Rafted Boulder Site 119, 599 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN569 ft
Ice-Rafted Boulder Site 272, 569 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN528 ft
Ice-Rafted Boulder Site 327, 528 ft, north Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN522 ft
Ice-Rafted Boulder Site 326, 522 ft, north Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN512 ft
Ice-Rafted Boulder Site 284, 512 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN507 ft
Ice-Rafted Boulder Site 275, 507 ft, Brownsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN502 ft
Ice-Rafted Boulder Site 289, 502 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN475 ft
Ice-Rafted Boulder Site 246, 475 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN455 ft
Ice-Rafted Boulder Site 64, 455 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN449 ft
Ice-Rafted Boulder Site 362, 449 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN442 ft
Ice-Rafted Boulder Site 229, 442 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN439 ft
Ice-Rafted Boulder Site 283, 439 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN433 ft
Ice-Rafted Boulder Site 287, 433 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN429 ft
Ice-Rafted Boulder Site 288, 429 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN420 ft
Ice-Rafted Boulder O'Connor 4, 420 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

O'CONNOR survey · OPEN →
UNKNOWN420 ft
Ice-Rafted Boulder Site 80, 420 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN410 ft
Ice-Rafted Boulder Site 142, 410 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN404 ft
Ice-Rafted Boulder Site 299, 404 ft, near Eugene area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN403 ft
Ice-Rafted Boulder Site 298, 403 ft, near Eugene area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
QUARTZITE400 ft
Quartzite Wells 12, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of quartzite. Its quartzite composition connects it to the Belt...

WELLS survey · OPEN →
GRANITE400 ft
Granite Allison 4, Tualatin / Sherwood area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

ALLISON(TABLE) survey · OPEN →
QUARTZITE400 ft
Quartzite Allison 41, near Eugene area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

ALLISON(TABLE) survey · OPEN →
GRANITE400 ft
Granite Allison 42, near Eugene area

This ice-rafted erratic is composed of granite and basalt. This granite likely originated in the Idaho...

ALLISON(TABLE) survey · OPEN →
UNKNOWN400 ft
Ice-Rafted Boulder Site 300, 400 ft, near Eugene area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN397 ft
Ice-Rafted Boulder Site 297, 397 ft, near Eugene area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN390 ft
Ice-Rafted Boulder Site 87, 390 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN390 ft
Ice-Rafted Boulder O'Connor 8, 390 ft, near Eugene area

This ice-rafted boulder, bearing glacial striations -- scratch marks from grinding against other rocks while...

MCDOWELL survey · OPEN →
UNKNOWN387 ft
Ice-Rafted Boulder Site 296, 387 ft, near Eugene area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN387 ft
Ice-Rafted Boulder Site 301, 387 ft, near Eugene area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN382 ft
Ice-Rafted Boulder Site 279, 382 ft, Eugene / Coburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
IRON-NICKEL380 ft
Ice-Rafted Boulder O'Connor 9, 380 ft, Wilsonville / Newberg area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

HUGHES survey · OPEN →
GRANITE375 ft
Granite Allison 33, Tangent / Halsey area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

ALLISON(TABLE) survey · OPEN →
UNKNOWN371 ft
Ice-Rafted Boulder Site 255, 371 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN369 ft
Ice-Rafted Boulder Site 295, 369 ft, Eugene / Coburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN367 ft
Ice-Rafted Boulder Site 82, 367 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
BASIC366 ft
Igneous Erratic 16, Eugene / Coburg area

This ice-rafted erratic, found near a local schoolyard, is identified as basic ig. rocks. This igneous rock...

PIPER survey · OPEN →
VARIED365 ft
Mixed Lithology Erratic 57, Rickreall / Independence area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

PIPER survey · OPEN →
DIORITE364 ft
Diorite Erratic 82, Monmouth / Aumsville area

This ice-rafted erratic is composed of diorite. Its diorite composition -- an intermediate igneous rock --...

PIPER survey · OPEN →
UNKNOWN363 ft
Ice-Rafted Boulder Site 270, 363 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN363 ft
Ice-Rafted Boulder Site 293, 363 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
METASEDIMENTARY360 ft
Metasedimentary Wells 17, Champoeg / Amity area

This ice-rafted erratic is composed of metasedimentary, metavolcanic. These metasedimentary and metavolcanic...

WELLS survey · OPEN →
METASEDIMENTARY358 ft
Metasedimentary Wells 18, Champoeg / Amity area

This ice-rafted erratic is composed of metasedimentary, metavolcanic. These metasedimentary and metavolcanic...

WELLS survey · OPEN →
UNKNOWN358 ft
Ice-Rafted Boulder Site 372, 358 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN354 ft
Ice-Rafted Boulder Site 247, 354 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN353 ft
Ice-Rafted Boulder Site 374, 353 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
VARIED350 ft
Mixed Lithology Erratic 37, Eugene / Coburg area

This ice-rafted erratic, blasted out of the ground by farmers clearing their fields, preserves multiple rock...

PIPER survey · OPEN →
GRANITE350 ft
Granite Wells 2, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

WELLS survey · OPEN →
GRANITE350 ft
Granite Allison 27, Albany / Lebanon area

This ice-rafted erratic, originally buried in Willamette Valley silt deposits, is composed of granite. This...

ALLISON(TABLE) survey · OPEN →
UNKNOWN350 ft
Ice-Rafted Boulder Allison 7, 350 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN343 ft
Ice-Rafted Boulder Site 365, 343 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN342 ft
Ice-Rafted Boulder Erratic 36, 342 ft, Eugene / Coburg area

This ice-rafted boulder, bearing glacial striations -- scratch marks from grinding against other rocks while...

PIPER survey · OPEN →
GRANODIORITE340 ft
Granodiorite Erratic 35, Eugene / Coburg area

This ice-rafted erratic, blasted out of the ground by farmers clearing their fields, is composed of...

PIPER survey · OPEN →
BIOTITE340 ft
Granodiorite Erratic 53, McMinnville / Dayton area

This ice-rafted erratic, repurposed by early settlers as building foundation stone, is composed of biotite...

PIPER survey · OPEN →
UNKNOWN340 ft
Ice-Rafted Boulder Allison 26, 340 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
GRANITE-GNEISS340 ft
Granite Gneiss Allison 40, Junction City / Harrisburg area

This ice-rafted erratic is composed of granite-gneiss with hornblende inclusions. Its granite-gneiss...

ALLISON(TABLE) survey · OPEN →
UNKNOWN339 ft
Ice-Rafted Boulder Site 253, 339 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN339 ft
Ice-Rafted Boulder Site 285, 339 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN338 ft
Ice-Rafted Boulder Bela 14, 338 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

BELA survey · OPEN →
UNKNOWN337 ft
Ice-Rafted Boulder Erratic 79, 337 ft, Eugene / Coburg area

This ice-rafted boulder, repurposed by early settlers as building foundation stone, is physical evidence of...

PIPER survey · OPEN →
GRANITE337 ft
Granite Wells 1, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

WELLS survey · OPEN →
UNKNOWN337 ft
Ice-Rafted Boulder Site 392, 337 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
QUARTZOSE336 ft
Quartzite Erratic 34, Junction City / Harrisburg area

This ice-rafted erratic, measuring approximately 4.0 x 3.5 x 1.6 feet, is composed of quartzose ig. or met....

PIPER survey · OPEN →
UNKNOWN335 ft
Ice-Rafted Boulder Site 290, 335 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN334 ft
Ice-Rafted Boulder Bela 16, 334 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

BELA survey · OPEN →
UNKNOWN332 ft
Ice-Rafted Boulder Site 269, 332 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANITIC330 ft
Granite Bela 1, Corvallis / Albany area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

BELA survey · OPEN →
UNKNOWN328 ft
Ice-Rafted Boulder Site 256, 328 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANODIORITE327 ft
Granodiorite Erratic 32, Junction City / Harrisburg area

This ice-rafted erratic, measuring approximately 2.4 x 1.6 x 1.0 feet, is composed of granodiorite. Its...

PIPER survey · OPEN →
UNKNOWN327 ft
Ice-Rafted Boulder Site 277, 327 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN326 ft
Ice-Rafted Boulder Site 294, 326 ft, Eugene / Coburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANODIORITE325 ft
Granodiorite Erratic 50, Dallas / Salem area

This ice-rafted erratic is composed of granodiorite. Its granodiorite composition points to an origin in the...

PIPER survey · OPEN →
GRANITIC325 ft
Granite Bela 2, Corvallis / Albany area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

BELA survey · OPEN →
UNKNOWN325 ft
Ice-Rafted Boulder Site 353, 325 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN324 ft
Ice-Rafted Boulder Site 333, 324 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANITE/GRANODIORITE/PORPH323 ft
Granodiorite Erratic 8, Sherwood / Parrett Mountain area

This ice-rafted erratic, blasted out of the ground by farmers clearing their fields, is composed of...

BRETZ, G. H. survey · OPEN →
UNKNOWN323 ft
Ice-Rafted Boulder Site 276, 323 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
XTAL322 ft
Gabbro Erratic 33, Junction City / Harrisburg area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

PIPER survey · OPEN →
GRANITIC321 ft
Granite Bela 7, Dallas / Salem area

This ice-rafted erratic is composed of granitic, sandstone. This granite likely originated in the Idaho...

BELA survey · OPEN →
UNKNOWN321 ft
Ice-Rafted Boulder Site 278, 321 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN321 ft
Ice-Rafted Boulder Site 291, 321 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN321 ft
Ice-Rafted Boulder Site 391, 321 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE319 ft
Granodiorite Erratic 17, Junction City / Harrisburg area

This ice-rafted erratic, measuring approximately 9 x 12 feet, is composed of biotite, hornblende,...

PIPER survey · OPEN →
UNKNOWN316 ft
Ice-Rafted Boulder Site 89, 316 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN316 ft
Ice-Rafted Boulder Site 273, 316 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE315 ft
Granodiorite Erratic 24, Monmouth / Aumsville area

This ice-rafted erratic, found on the historic Tracey Givens property, is composed of biotite granodiorite....

PIPER survey · OPEN →
UNKNOWN315 ft
Ice-Rafted Boulder O'Connor 1, 315 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

BEESON survey · OPEN →
UNKNOWN315 ft
Ice-Rafted Boulder Wells 4, 315 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

WELLS survey · OPEN →
UNKNOWN312 ft
Ice-Rafted Boulder Site 88, 312 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN311 ft
Ice-Rafted Boulder Site 292, 311 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN310 ft
Ice-Rafted Boulder Wells 5, 310 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

WELLS survey · OPEN →
GRANITE310 ft
Granite Gneiss Allison 38, Junction City / Harrisburg area

This ice-rafted erratic is composed of granite, gneiss. Its granite-gneiss composition indicates metamorphic...

ALLISON(TABLE) survey · OPEN →
UNKNOWN308 ft
The Gladstone Baculite, Allen 2

This ice-rafted boulder, containing a preserved baculite fossil -- a Cretaceous marine organism entombed in...

ALLEN survey · OPEN →
ARGILLITE306 ft
The Belleview Erratic, O'Connor 5

This ice-rafted erratic, known as 'The Belleview Erratic,' a well-known landmark, is composed of argillite....

HODGE survey · OPEN →
UNKNOWN305 ft
Ice-Rafted Boulder Site 84, 305 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN305 ft
Ice-Rafted Boulder Wells 3, 305 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

WELLS survey · OPEN →
UNKNOWN303 ft
Ice-Rafted Boulder Site 268, 303 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN301 ft
Ice-Rafted Boulder Site 331, 301 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANODIORITE300 ft
Granodiorite Erratic 47, Dallas / Salem area

This ice-rafted erratic is composed of granodiorite. Its granodiorite composition points to an origin in the...

PIPER survey · OPEN →
GRANITE300 ft
Granite Wells 9, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of granite, gabbro. This granite likely originated in the Idaho...

WELLS survey · OPEN →
UNKNOWN300 ft
Ice-Rafted Boulder Allen 4, 300 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLEN survey · OPEN →
GRANITE300 ft
Granodiorite Allison 22, Dallas / Salem area

This ice-rafted erratic is composed of granite, basalt, granodiorite. Its granite, basalt, granodiorite...

ALLISON(TABLE) survey · OPEN →
GRANITE300 ft
Granite Allison 31, Albany / Lebanon area

This ice-rafted erratic, measuring approximately 5 x 3 x 2 feet, is composed of granite. This granite likely...

ALLISON(TABLE) survey · OPEN →
SLATE300 ft
Slate Allison 32, Corvallis area

This ice-rafted erratic is composed of slate. This slate -- a fine-grained metamorphic rock -- likely...

ALLISON(TABLE) survey · OPEN →
UNKNOWN300 ft
Ice-Rafted Boulder Allison 36, 300 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN300 ft
Ice-Rafted Boulder Site 239, 300 ft, Monmouth / Aumsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN300 ft
Ice-Rafted Boulder Site 280, 300 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN299 ft
Ice-Rafted Boulder Site 347, 299 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN297 ft
Ice-Rafted Boulder Site 120, 297 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN297 ft
Ice-Rafted Boulder Site 240, 297 ft, Monmouth / Aumsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN297 ft
Ice-Rafted Boulder Site 286, 297 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN295 ft
Ice-Rafted Boulder Site 140, 295 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANITE295 ft
Granite Wells 10, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of granite, gabbro. This granite likely originated in the Idaho...

WELLS survey · OPEN →
GNEISS295 ft
Gneiss Allison 34, Tangent / Halsey area

This ice-rafted erratic is composed of gneiss. This gneiss -- a banded metamorphic rock -- traces back to the...

ALLISON(TABLE) survey · OPEN →
GRANODIORITE295 ft
Granodiorite O'Connor 13, Portland area

This ice-rafted erratic, measuring approximately 4 x 4 x 3 feet, is composed of granodiorite. Its...

O'CONNOR survey · OPEN →
GRANITIC295 ft
Granite Bela 6, Dallas / Salem area

This ice-rafted erratic is composed of granitic and sandstone. This granite likely originated in the Idaho...

BELA survey · OPEN →
UNKNOWN294 ft
Ice-Rafted Boulder Site 252, 294 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN294 ft
Ice-Rafted Boulder Site 349, 294 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN293 ft
Ice-Rafted Boulder Site 302, 293 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
QUARTZITE293 ft
Quartzite O'Connor 7, Brownsville / Harrisburg area

This ice-rafted erratic is composed of quartzite. Its quartzite composition connects it to the Belt...

O'CONNOR survey · OPEN →
UNKNOWN292 ft
Ice-Rafted Boulder Site 67, 292 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN291 ft
Ice-Rafted Boulder Site 143, 291 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN291 ft
Ice-Rafted Boulder Site 232, 291 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN291 ft
Ice-Rafted Boulder Site 267, 291 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN291 ft
Ice-Rafted Boulder Site 282, 291 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANODIORITE290 ft
Granodiorite Erratic 18, Albany / Lebanon area

This ice-rafted erratic, measuring approximately 2 x 3 x 4 feet, is composed of granodiorite. Its...

PIPER survey · OPEN →
UNKNOWN290 ft
Ice-Rafted Boulder Site 70, 290 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN290 ft
Ice-Rafted Boulder Site 83, 290 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANITE290 ft
Granite Wells 11, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of granite, gabbro. This granite likely originated in the Idaho...

WELLS survey · OPEN →
QUARTZITE290 ft
Quartzite Allison 21, Dallas / Salem area

This ice-rafted erratic is composed of quartzite. Its quartzite composition connects it to the Belt...

ALLISON(TABLE) survey · OPEN →
QUARTZITE290 ft
Granite Gneiss Bela 5, Dallas / Salem area

This ice-rafted erratic is composed of quartzite, granite/gneiss. Its granite-gneiss composition indicates...

BELA survey · OPEN →
QUARTZITE290 ft
Quartzite O'Connor 11, Brownsville / Harrisburg area

This ice-rafted erratic is composed of quartzite. Its quartzite composition connects it to the Belt...

O'CONNOR survey · OPEN →
UNKNOWN290 ft
Ice-Rafted Boulder Site 329, 290 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN289 ft
Ice-Rafted Boulder Site 234, 289 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN288 ft
Ice-Rafted Boulder Site 271, 288 ft, Corvallis area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN287 ft
Ice-Rafted Boulder Site 263, 287 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANITIC287 ft
Granite O'Connor 10, Brownsville / Harrisburg area

This ice-rafted erratic is composed of granitic. This granite likely originated in the Idaho Batholith, a...

O'CONNOR survey · OPEN →
VARIED285 ft
Mixed Lithology Erratic 48, Dallas / Salem area

This ice-rafted erratic, measuring approximately 3.8 x 2.7 x 2.0 feet, preserves multiple rock types at this...

PIPER survey · OPEN →
GRANODIORITE285 ft
Granodiorite Erratic 49, Dallas / Salem area

This ice-rafted erratic, measuring approximately 6 x 3 feet, is composed of granodiorite, bs, diabse. Its...

PIPER survey · OPEN →
ANDESITE285 ft
Andesite Erratic 56, Rickreall / Independence area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

PIPER survey · OPEN →
PYRITIC285 ft
Quartzite Allison 35, Tangent / Halsey area

This ice-rafted erratic, measuring approximately 2.5 x 2 x 1 feet, is composed of pyritic quartzite. Its...

ALLISON(TABLE) survey · OPEN →
UNKNOWN285 ft
Ice-Rafted Boulder Bela 15, 285 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

BELA survey · OPEN →
UNKNOWN284 ft
Ice-Rafted Boulder Site 231, 284 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE282 ft
Granodiorite Erratic 43, Brownsville / Harrisburg area

This ice-rafted erratic, measuring approximately 3.5 x 2.5 x 2.2 feet, is composed of biotite granodiorite....

PIPER survey · OPEN →
BIOTITE280 ft
Granodiorite Erratic 26, Corvallis area

This ice-rafted erratic, measuring approximately 2 x 3 x 5 feet, is composed of biotite hornblende...

PIPER survey · OPEN →
GRANODIORITE280 ft
Granodiorite Erratic 51, Dallas / Salem area

This ice-rafted erratic, discovered on farmstead property, is composed of granodiorite. Its granodiorite...

PIPER survey · OPEN →
GRANITIC280 ft
Granite O'Connor 2, Corvallis area

This ice-rafted erratic is composed of granitic. This granite likely originated in the Idaho Batholith, a...

FILLMORE survey · OPEN →
UNKNOWN280 ft
Ice-Rafted Boulder Site 243, 280 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN276 ft
Ice-Rafted Boulder Site 259, 276 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
PORPH275 ft
Granodiorite Erratic 9b, Sherwood / Parrett Mountain area

This ice-rafted erratic, found at the foot of Pete's Mountain, is composed of porph. biotite granodiorite...

BRETZ, G. H. survey · OPEN →
BIOTITE275 ft
Granodiorite Erratic 65, Sherwood / Parrett Mountain area

This ice-rafted erratic, deeply weathered from roughly 15,000 years of exposure, is composed of biotite...

PIPER survey · OPEN →
GNEISS275 ft
Riverdale Schoolyard Gneiss, Allen 3

This ice-rafted erratic, found near a local schoolyard, is composed of gneiss. This gneiss -- a banded...

ALLEN survey · OPEN →
UNKNOWN275 ft
Ice-Rafted Boulder Allison 23, 275 ft, Monmouth / Aumsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN275 ft
Ice-Rafted Boulder Site 281, 275 ft, Brownsville / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN271 ft
Ice-Rafted Boulder Site 241, 271 ft, Monmouth / Aumsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
QUARTZOSE270 ft
Granodiorite Erratic 22, Brownsville area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

PIPER survey · OPEN →
UNKNOWN269 ft
Ice-Rafted Boulder Site 266, 269 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN269 ft
Ice-Rafted Boulder Site 371, 269 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN268 ft
Ice-Rafted Boulder Site 145, 268 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN268 ft
Ice-Rafted Boulder Site 230, 268 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN268 ft
Ice-Rafted Boulder Site 262, 268 ft, Brownsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN266 ft
Ice-Rafted Boulder Site 114, 266 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN266 ft
Ice-Rafted Boulder Site 373, 266 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN265 ft
Ice-Rafted Boulder Site 86, 265 ft, Tangent / Halsey area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
FELSIC265 ft
Metasedimentary Wells 6, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of felsic? diabase? metavolcanic. These metasedimentary and metavolcanic...

WELLS survey · OPEN →
UNKNOWN265 ft
Ice-Rafted Boulder Wells 13, 265 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

WELLS survey · OPEN →
UNKNOWN265 ft
Ice-Rafted Boulder Site 330, 265 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN264 ft
Ice-Rafted Boulder Site 348, 264 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN261 ft
Ice-Rafted Boulder Site 139, 261 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN261 ft
Ice-Rafted Boulder Site 260, 261 ft, Brownsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE260 ft
Granite Erratic 71, Tualatin / Sherwood area

This ice-rafted erratic, measuring approximately 2.5 x 2 x 1.5 feet, is composed of biotite granite. This...

PIPER survey · OPEN →
FELSIC260 ft
Metasedimentary Wells 7, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of felsic? diabase? metavolcanic. These metasedimentary and metavolcanic...

WELLS survey · OPEN →
FELSIC260 ft
Metasedimentary Wells 8, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of felsic? diabase? metavolcanic. These metasedimentary and metavolcanic...

WELLS survey · OPEN →
UNKNOWN259 ft
Ice-Rafted Boulder Site 339, 259 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN258 ft
Ice-Rafted Boulder Site 354, 258 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN255 ft
Ice-Rafted Boulder Site 74, 255 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANITE255 ft
Granite Allison 28, Albany / Lebanon area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

ALLISON(TABLE) survey · OPEN →
UNKNOWN255 ft
Ice-Rafted Boulder Site 261, 255 ft, Brownsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN255 ft
Ice-Rafted Boulder Site 265, 255 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN252 ft
Ice-Rafted Boulder Site 150, 252 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
ANDESITE250 ft
Granodiorite Erratic 61, Champoeg / Amity area

This ice-rafted erratic is composed of andesite or granodiorite. Its andesite or granodiorite composition...

PIPER survey · OPEN →
QTZ250 ft
Schist Erratic 64, Sherwood / Parrett Mountain area

This ice-rafted erratic, measuring approximately 3 x 3 x 3.5 feet, is composed of qtz schist. This schist --...

PIPER survey · OPEN →
UNKNOWN250 ft
Ice-Rafted Boulder Site 73, 250 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
METASEDIMENTARY250 ft
Metasedimentary Wells 15, Wilsonville / Newberg area

This ice-rafted erratic is composed of metasedimentary, metavolcanic. These metasedimentary and metavolcanic...

WELLS survey · OPEN →
UNKNOWN250 ft
Ice-Rafted Boulder Allison 5, 250 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN250 ft
Ice-Rafted Boulder Site 249, 250 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN250 ft
Ice-Rafted Boulder Site 251, 250 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN250 ft
Ice-Rafted Boulder Site 254, 250 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN250 ft
Ice-Rafted Boulder Allison 16, 250 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN250 ft
Ice-Rafted Boulder Allison 19, 250 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
LIMESTONE250 ft
Ice-Rafted Boulder Allison 37, 250 ft, Brownsville area

This ice-rafted erratic, measuring approximately 3 x 2 x 1.5 feet, is identified as Limestone, somewhat...

ALLISON(TABLE) survey · OPEN →
UNKNOWN248 ft
Ice-Rafted Boulder Site 126, 248 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
QTZ246 ft
Quartz Erratic 75, Tangent / Halsey area

This ice-rafted erratic, found at the roadside, is composed of qtz (?). This quartz specimen may have...

PIPER survey · OPEN →
UNKNOWN246 ft
Ice-Rafted Boulder Site 370, 246 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
DIORITE245 ft
Diorite Erratic 40, Monmouth / Aumsville area

This ice-rafted erratic, measuring approximately 5 x 3.5 x 2 feet, is composed of diorite. Its diorite...

PIPER survey · OPEN →
GRANITE245 ft
Granite Wells 14, Portland area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

WELLS survey · OPEN →
UNKNOWN245 ft
Ice-Rafted Boulder Bela 8, 245 ft, Dallas / Salem area

This ice-rafted boulder, found at the roadside, is physical evidence of the cataclysmic Missoula floods that...

BELA survey · OPEN →
UNKNOWN244 ft
Ice-Rafted Boulder Site 245, 244 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN243 ft
Ice-Rafted Boulder Site 258, 243 ft, Corvallis area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN243 ft
Ice-Rafted Boulder Site 397, 243 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN242 ft
Ice-Rafted Boulder Site 233, 242 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN240 ft
Ice-Rafted Boulder Site 81, 240 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN240 ft
Ice-Rafted Boulder Site 390, 240 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN239 ft
Ice-Rafted Boulder Site 149, 239 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN239 ft
Ice-Rafted Boulder Site 235, 239 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANODIORITE235 ft
Granodiorite Erratic 19, Albany / Lebanon area

This ice-rafted erratic, measuring approximately 1.5 x 1 x 1 feet, is composed of granodiorite. Its...

PIPER survey · OPEN →
UNKNOWN235 ft
Ice-Rafted Boulder Site 76, 235 ft, Monmouth / Aumsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANITE233 ft
Granite Erratic 45, Tangent / Halsey area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

PIPER survey · OPEN →
UNKNOWN232 ft
Ice-Rafted Boulder Bela 9, 232 ft, Dallas / Salem area

This ice-rafted boulder, found at the roadside, is physical evidence of the cataclysmic Missoula floods that...

BELA survey · OPEN →
UNKNOWN231 ft
Ice-Rafted Boulder Site 77, 231 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN230 ft
Ice-Rafted Boulder Site 85, 230 ft, Corvallis area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
QUARTZITIC230 ft
Quartz Bela 4, Albany / Lebanon area

This ice-rafted erratic is composed of quartzitic and quartz. This quartz specimen may have originated from...

BELA survey · OPEN →
UNKNOWN230 ft
Ice-Rafted Boulder Site 369, 230 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN229 ft
Ice-Rafted Boulder Site 351, 229 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN229 ft
Ice-Rafted Boulder Site 378, 229 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN228 ft
Ice-Rafted Boulder Site 226, 228 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN227 ft
Ice-Rafted Boulder Site 78, 227 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
BIOTITE225 ft
Granodiorite Erratic 21, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of biotite granodiorite. Its biotite granodiorite composition points to...

PIPER survey · OPEN →
BIOTITE225 ft
Granodiorite Erratic 73, Wilsonville / Newberg area

This ice-rafted erratic, measuring approximately 2.5 x 2 x 1.5 feet, is composed of biotite granodiorite. Its...

PIPER survey · OPEN →
QUARTZITE225 ft
Granite Bela 12, Dallas / Salem area

This ice-rafted erratic is composed of quartzite, granitic. This granite likely originated in the Idaho...

BELA survey · OPEN →
UNKNOWN224 ft
Ice-Rafted Boulder Site 332, 224 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN223 ft
Ice-Rafted Boulder Bela 11, 223 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

BELA survey · OPEN →
UNKNOWN223 ft
Ice-Rafted Boulder Site 236, 223 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN222 ft
Ice-Rafted Boulder Site 129, 222 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANITIC222 ft
Granite Bela 13, Dallas / Salem area

This ice-rafted erratic is composed of granitic?. This granite likely originated in the Idaho Batholith, a...

BELA survey · OPEN →
UNKNOWN222 ft
Ice-Rafted Boulder Site 227, 222 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN220 ft
Ice-Rafted Boulder Site 75, 220 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN220 ft
Ice-Rafted Boulder Bela 10, 220 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

BELA survey · OPEN →
UNKNOWN220 ft
Ice-Rafted Boulder Site 224, 220 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN220 ft
Ice-Rafted Boulder Site 250, 220 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN220 ft
Ice-Rafted Boulder Site 384, 220 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN220 ft
Ice-Rafted Boulder Site 393, 220 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN219 ft
Ice-Rafted Boulder Site 367, 219 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN218 ft
Ice-Rafted Boulder Site 121, 218 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
METASEDIMENTARY218 ft
Metasedimentary Wells 16, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of metasedimentary, metavolcanic. These metasedimentary and metavolcanic...

WELLS survey · OPEN →
UNKNOWN218 ft
Ice-Rafted Boulder Site 228, 218 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN218 ft
Ice-Rafted Boulder Site 257, 218 ft, Corvallis area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN217 ft
Ice-Rafted Boulder Site 264, 217 ft, Corvallis area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN216 ft
Ice-Rafted Boulder Site 238, 216 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE215 ft
Schist Erratic 52, Rickreall / Independence area

This ice-rafted erratic, measuring approximately 3 x 2.5 x 1.5 feet, is composed of biotite schist (?). This...

PIPER survey · OPEN →
UNKNOWN214 ft
Ice-Rafted Boulder Site 151, 214 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN214 ft
Ice-Rafted Boulder Site 248, 214 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN213 ft
Ice-Rafted Boulder Site 131, 213 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN213 ft
Ice-Rafted Boulder Site 352, 213 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN211 ft
Ice-Rafted Boulder Site 79, 211 ft, Albany / Lebanon area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANITE210 ft
Granite Erratic 44, Tangent / Halsey area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

PIPER survey · OPEN →
UNKNOWN210 ft
Ice-Rafted Boulder Site 148, 210 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN210 ft
Ice-Rafted Boulder Allison 17, 210 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN209 ft
Ice-Rafted Boulder Site 394, 209 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN208 ft
Ice-Rafted Boulder Site 396, 208 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN207 ft
Ice-Rafted Boulder Site 376, 207 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN206 ft
Ice-Rafted Boulder Site 104, 206 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN206 ft
Ice-Rafted Boulder Site 355, 206 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN205 ft
Ice-Rafted Boulder Site 61, 205 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN205 ft
Ice-Rafted Boulder Site 69, 205 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN202 ft
Ice-Rafted Boulder Site 225, 202 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN202 ft
Ice-Rafted Boulder Site 358, 202 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN201 ft
Ice-Rafted Boulder Site 138, 201 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN201 ft
Ice-Rafted Boulder Site 244, 201 ft, Corvallis / Albany area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANITE200 ft
Granodiorite Erratic 62, Portland area

This ice-rafted erratic is composed of granite or granodiorite. Its granite or granodiorite composition...

PIPER survey · OPEN →
GRANITE200 ft
Granite Gneiss Erratic 63, Champoeg / Amity area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

PIPER survey · OPEN →
GRANITE200 ft
Granite Allison 24, Monmouth / Aumsville area

This ice-rafted erratic, measuring approximately 2 x 3 x 5 feet, is composed of granite. This granite likely...

ALLISON(TABLE) survey · OPEN →
GRANITE200 ft
Granite O'Connor 14, Wilsonville / Newberg area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

TREASHER survey · OPEN →
UNKNOWN200 ft
Ice-Rafted Boulder Allison 14, 200 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN198 ft
Ice-Rafted Boulder Site 65, 198 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN198 ft
Ice-Rafted Boulder Site 130, 198 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN197 ft
Ice-Rafted Boulder Site 335, 197 ft, north Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN196 ft
Ice-Rafted Boulder Site 127, 196 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN196 ft
Ice-Rafted Boulder Site 364, 196 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE195 ft
Granite Erratic 70, Portland area

This ice-rafted erratic is composed of biotite granite. This granite likely originated in the Idaho...

PIPER survey · OPEN →
METAMORPHIC195 ft
Metamorphic O'Connor 6, Dallas / Salem area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

O'CONNOR survey · OPEN →
UNKNOWN195 ft
Ice-Rafted Boulder Site 242, 195 ft, Monmouth / Aumsville area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN194 ft
Ice-Rafted Boulder Site 366, 194 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN193 ft
Ice-Rafted Boulder Site 63, 193 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN193 ft
Ice-Rafted Boulder Site 337, 193 ft, north Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN192 ft
Ice-Rafted Boulder Site 343, 192 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN192 ft
Ice-Rafted Boulder Site 389, 192 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN191 ft
Ice-Rafted Boulder Site 346, 191 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN190 ft
Ice-Rafted Boulder Allen 5, 190 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLEN survey · OPEN →
GRANITE190 ft
Granite Allison 8, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

ALLISON(TABLE) survey · OPEN →
QUARTZITE190 ft
Quartzite Allison 10, Sherwood / Parrett Mountain area

This ice-rafted erratic, measuring approximately 3.5 x 1.5 x 1 feet, is composed of quartzite. Its quartzite...

ALLISON(TABLE) survey · OPEN →
UNKNOWN188 ft
Ice-Rafted Boulder Site 400, 188 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
BIOTITE187 ft
Granite Erratic 66, Sherwood / Parrett Mountain area

This ice-rafted erratic, measuring approximately 1.5 x 2 x 1 feet, is composed of biotite granite. This...

PIPER survey · OPEN →
UNKNOWN187 ft
Ice-Rafted Boulder Site 387, 187 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN186 ft
Ice-Rafted Boulder Site 237, 186 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANODIORITE185 ft
Granodiorite Erratic 72, Tualatin / Sherwood area

This ice-rafted erratic, found at the roadside, is composed of granodiorite or granite. Its granodiorite or...

PIPER survey · OPEN →
UNKNOWN185 ft
Ice-Rafted Boulder Site 72, 185 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN184 ft
Ice-Rafted Boulder Site 363, 184 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN183 ft
Ice-Rafted Boulder Site 99, 183 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN183 ft
Ice-Rafted Boulder Site 125, 183 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN183 ft
Ice-Rafted Boulder Site 135, 183 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN183 ft
Ice-Rafted Boulder Bela 3, 183 ft, Corvallis / Albany area

This ice-rafted boulder, discovered on farmstead property, is physical evidence of the cataclysmic Missoula...

BELA survey · OPEN →
UNKNOWN182 ft
Ice-Rafted Boulder Site 128, 182 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN182 ft
Ice-Rafted Boulder Site 398, 182 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN181 ft
Ice-Rafted Boulder Site 132, 181 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN181 ft
Ice-Rafted Boulder Site 147, 181 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN181 ft
Ice-Rafted Boulder Site 340, 181 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
GRANITE180 ft
Granite Erratic 68, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

PIPER survey · OPEN →
UNKNOWN180 ft
Ice-Rafted Boulder Site 62, 180 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN180 ft
Ice-Rafted Boulder Site 136, 180 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANITE180 ft
Granite Allison 15, McMinnville / Dayton area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

ALLISON(TABLE) survey · OPEN →
UNKNOWN180 ft
Ice-Rafted Boulder Site 342, 180 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN178 ft
Ice-Rafted Boulder Site 141, 178 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN177 ft
Ice-Rafted Boulder Site 71, 177 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN177 ft
Ice-Rafted Boulder Site 350, 177 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN176 ft
Ice-Rafted Boulder Site 357, 176 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN176 ft
Ice-Rafted Boulder Site 381, 176 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN176 ft
Ice-Rafted Boulder Site 386, 176 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN175 ft
Ice-Rafted Boulder Site 92, 175 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN175 ft
Ice-Rafted Boulder Allison 12, 175 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN175 ft
Ice-Rafted Boulder Site 377, 175 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN174 ft
Ice-Rafted Boulder Site 388, 174 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN173 ft
Ice-Rafted Boulder Site 334, 173 ft, north Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN173 ft
Ice-Rafted Boulder Site 336, 173 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN173 ft
Ice-Rafted Boulder Site 383, 173 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE172 ft
Granodiorite Erratic 20, Champoeg / Amity area

This ice-rafted erratic, measuring approximately 2.5 x 3 x 3.5 feet, is composed of biotite granodiorite. Its...

PIPER survey · OPEN →
UNKNOWN172 ft
Ice-Rafted Boulder Site 109, 172 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN171 ft
Ice-Rafted Boulder Site 123, 171 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN171 ft
Ice-Rafted Boulder Site 146, 171 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
BIOTITE170 ft
Granodiorite Erratic 25, McMinnville / Dayton area

This ice-rafted erratic, measuring approximately 2.5 x 1.9 x 1.1 feet, is composed of biotite hornblende...

PIPER survey · OPEN →
UNKNOWN170 ft
Ice-Rafted Boulder Site 96, 170 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN170 ft
Ice-Rafted Boulder Site 117, 170 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN170 ft
Ice-Rafted Boulder Allison 13, 170 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN170 ft
Ice-Rafted Boulder Site 338, 170 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN170 ft
Ice-Rafted Boulder Site 341, 170 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN170 ft
Ice-Rafted Boulder Site 344, 170 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN168 ft
Ice-Rafted Boulder Site 122, 168 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN167 ft
Ice-Rafted Boulder Site 107, 167 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN166 ft
Ice-Rafted Boulder Site 108, 166 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANODIORITE165 ft
Granodiorite Erratic 54, McMinnville / Dayton area

This ice-rafted erratic, discovered on farmstead property, is composed of granodiorite. Its granodiorite...

PIPER survey · OPEN →
BIOTITE165 ft
Granodiorite Erratic 55, McMinnville / Dayton area

This ice-rafted erratic is composed of biotite granodiorite. Its biotite granodiorite composition points to...

PIPER survey · OPEN →
GRANODIORITE165 ft
Granodiorite O'Connor 15, Rickreall / Independence area

This ice-rafted erratic is composed of granodiorite. Its granodiorite composition points to an origin in the...

WOZNIAK survey · OPEN →
UNKNOWN165 ft
Ice-Rafted Boulder Site 328, 165 ft, north Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN164 ft
Ice-Rafted Boulder Site 100, 164 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN163 ft
Ice-Rafted Boulder Site 124, 163 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN163 ft
Ice-Rafted Boulder Site 134, 163 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN163 ft
Ice-Rafted Boulder Site 379, 163 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN162 ft
Ice-Rafted Boulder Site 93, 162 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANITE160 ft
Granite Allison 11, Champoeg / Amity area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

ALLISON(TABLE) survey · OPEN →
UNKNOWN158 ft
Ice-Rafted Boulder Site 105, 158 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN158 ft
Ice-Rafted Boulder Site 385, 158 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
QTZ157 ft
Diorite Erratic 69, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of qtz. diorite. Its diorite composition -- an intermediate igneous rock...

PIPER survey · OPEN →
UNKNOWN157 ft
Ice-Rafted Boulder Site 102, 157 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN156 ft
Ice-Rafted Boulder Site 345, 156 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN155 ft
Ice-Rafted Boulder Site 97, 155 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN155 ft
Ice-Rafted Boulder Site 112, 155 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN155 ft
Ice-Rafted Boulder Site 356, 155 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN155 ft
Ice-Rafted Boulder Site 395, 155 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN154 ft
Ice-Rafted Boulder Site 110, 154 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN151 ft
Ice-Rafted Boulder Site 118, 151 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
GRANODIORITE150 ft
Granodiorite Erratic 59, Champoeg / Amity area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

PIPER survey · OPEN →
QUARTZITE150 ft
Quartzite Allison 1, Portland area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

ALLISON(TABLE) survey · OPEN →
UNKNOWN150 ft
Ice-Rafted Boulder Allison 2, 150 ft, Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN150 ft
Ice-Rafted Boulder Site 399, 150 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN148 ft
Ice-Rafted Boulder Site 103, 148 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN147 ft
Ice-Rafted Boulder Site 95, 147 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN147 ft
Ice-Rafted Boulder Site 359, 147 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN146 ft
Ice-Rafted Boulder Site 133, 146 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN142 ft
Ice-Rafted Boulder Site 375, 142 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN141 ft
Ice-Rafted Boulder Site 360, 141 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN139 ft
Ice-Rafted Boulder Site 113, 139 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN138 ft
Ice-Rafted Boulder Site 361, 138 ft, Tualatin / Sherwood area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN135 ft
Ice-Rafted Boulder Site 90, 135 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN134 ft
Ice-Rafted Boulder Site 137, 134 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN127 ft
Ice-Rafted Boulder Site 106, 127 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN125 ft
Ice-Rafted Boulder Site 66, 125 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN125 ft
Ice-Rafted Boulder Site 144, 125 ft, Dallas / Salem area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN122 ft
Ice-Rafted Boulder Site 101, 122 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN120 ft
Ice-Rafted Boulder Site 116, 120 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN118 ft
Ice-Rafted Boulder Site 115, 118 ft, McMinnville / Dayton area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN116 ft
Ice-Rafted Boulder Site 368, 116 ft, Wilsonville / Newberg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN110 ft
Ice-Rafted Boulder Site 111, 110 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN110 ft
Ice-Rafted Boulder Site 324, 110 ft, north Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN108 ft
Ice-Rafted Boulder Site 382, 108 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE100 ft
Granodiorite Erratic 60, Champoeg / Amity area

This ice-rafted erratic is composed of biotite granodiorite. Its biotite granodiorite composition points to...

PIPER survey · OPEN →
UNKNOWN100 ft
Ice-Rafted Boulder Site 94, 100 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
BIOTITE100 ft
Granite O'Connor 12, Sherwood / Parrett Mountain area

This ice-rafted erratic, bearing glacial striations -- scratch marks from grinding against other rocks while...

TREASHER survey · OPEN →
UNKNOWN96 ft
Ice-Rafted Boulder Site 98, 96 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN95 ft
Ice-Rafted Boulder Site 91, 95 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN91 ft
Ice-Rafted Boulder Site 68, 91 ft, Champoeg / Amity area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(FIG) survey · OPEN →
UNKNOWN80 ft
Ice-Rafted Boulder Site 325, 80 ft, north Portland area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
KYANITE75 ft
The Mannings Kyanite, Allen 1

This ice-rafted erratic is composed of kyanite. Kyanite is a distinctive blue metamorphic mineral that forms...

ALLEN survey · OPEN →
UNKNOWN55 ft
Ice-Rafted Boulder Site 380, 55 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN54 ft
Ice-Rafted Boulder Site 323, 54 ft elevation

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
UNKNOWN32 ft
Ice-Rafted Boulder Site 322, 32 ft elevation

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON (FIG) survey · OPEN →
BIOTITE225-250 ft
Granite Erratic 9a, Sherwood / Parrett Mountain area

This ice-rafted erratic, found at the foot of Pete's Mountain, is composed of biotite granite. This granite...

BRETZ, G. H. survey · OPEN →
BIOTITE175-200 ft
Granite Erratic 9c, Sherwood / Parrett Mountain area

This ice-rafted erratic, found at the foot of Pete's Mountain, is composed of biotite granite. This granite...

BRETZ, G. H. survey · OPEN →
BIOTITE115-120 ft
Granodiorite Erratic 58, Champoeg / Amity area

This ice-rafted erratic, measuring approximately 3 x 3 x 2 feet, is composed of biotite schist, biotite grano...

PIPER survey · OPEN →
GRANODIORITE175-250 ft
Granodiorite Erratic 67a, Sherwood / Parrett Mountain area

This ice-rafted erratic is composed of granodiorite. Its granodiorite composition points to an origin in the...

PIPER survey · OPEN →
GRANODIORITE175-250 ft
Granodiorite Erratic 67b, Champoeg / Amity area

This ice-rafted erratic is composed of granodiorite. Its granodiorite composition points to an origin in the...

PIPER survey · OPEN →
GRANITIC240-250 ft
Granite O'Connor 3, Dallas / Salem area

This ice-rafted erratic, found at the roadside, is composed of granitic. This granite likely originated in...

O'CONNOR survey · OPEN →
GNEISS375-400 ft
Gneiss Allison 3, north Portland area

This ice-rafted erratic is composed of gneiss, qtzite. This gneiss -- a banded metamorphic rock -- traces...

ALLISON(TABLE) survey · OPEN →
MOSTLY175-225 ft
Granite Allison 6, Wilsonville / Newberg area

This ice-rafted erratic is composed of mostly granite. This granite likely originated in the Idaho Batholith,...

ALLISON(TABLE) survey · OPEN →
GRANITE275-300 ft
Granite Allison 25, Corvallis / Albany area

This ice-rafted erratic is composed of granite. This granite likely originated in the Idaho Batholith, a...

ALLISON(TABLE) survey · OPEN →
SEVERAL325-350 ft
Mixed Lithology Allison 29, Albany / Lebanon area

This ice-rafted erratic preserves multiple rock types at this location. Multiple rock types at a single...

ALLISON(TABLE) survey · OPEN →
SEVERAL200-225 ft
Mixed Lithology Allison 30, Albany / Lebanon area

This ice-rafted erratic preserves multiple rock types at this location. Multiple rock types at a single...

ALLISON(TABLE) survey · OPEN →
UNKNOWN325-350 ft
Ice-Rafted Boulder Allison 39, 325-350 ft, Junction City / Harrisburg area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN275-325 ft
Ice-Rafted Boulder Allison 9, 275-325 ft, Sherwood / Parrett Mountain area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
UNKNOWN300-325 ft
Ice-Rafted Boulder Allison 18, 300-325 ft, Rickreall / Independence area

This ice-rafted boulder is physical evidence of the cataclysmic Missoula floods that swept through this...

ALLISON(TABLE) survey · OPEN →
GRANITE225-300 ft
Granite Allison 20, Dallas / Salem area

This ice-rafted erratic is composed of granite, quartzite, porphyry. This granite likely originated in the...

ALLISON(TABLE) survey · OPEN →
400 of 400 Field records: A. Piper, USGS Willamette Valley survey 1928–29 · integrated with IAFI