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Talus and basalt scablands, Washington

Talus and the Twin Sisters, scablands remnants from erosion by the Missoula Floods, Washington (150702-101)g

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Wanapum Basalt and scablands, Washington

Wanapum Basalt (Columbia River Basalt Group) and the Twin Sisters, a prominent erosional remnant from the MIssoula Floods near Wallula Gap, Washington. Photo shows both colonnade (outcrop on right and bottom of Twin Sisterns) and entablature (top of Twin Sisters) (150702-99)

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Flows of Wanapum Basalt, Washington

Flows of Wanapum Basalt (Columbia River Basalt Group), Washington (150702-88)

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Scablands remnant from Missoula Floods, Washington

The Twin Sisters, a prominent erosional remnant of the MIssoula Floods near Wallula Gap, Washington. Made of Wanapum Basalt of the Columbia River Basalt Group. Photo shows both colonnade (bottom) and entablature (top of Twin Sisters) (150702-87)

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Wanapum Basalt and scablands, Washington

Wanapum Basalt (Columbia River Basalt Group) and the Twin Sisters, a prominent scablands from the MIssoula Floods near Wallula Gap, Washington. Photo shows both colonnade (outcrop on right and bottom of Twin Sisterns) and entablature (top of Twin Sisters) (150702-83)

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Interbedded flood gravel and slackwater deposits, Washington

Interbedded gravel and slackwater deposits from Missoula Floods along WA14 in Washington. (150702-33)

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Sailboarders in Columbia Gorge, WA-OR (Pan)

Sailboarders enjoying the regular winds on the Columbia River in Columbia Gorge, Washington (left) and Oregon. (140710-30)

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Field burning, Oregon

Smoke and ash rises as a plume from agricultural field burning, Willamette Valley, Oregon. (MG_7229)

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Field burning, Oregon (Vertical)

Smoke and ash rises as a plume from agricultural field burning, Willamette Valley, Oregon. (MG_7225) soot, air pollution, agriculture

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Field burning, Oregon (Vertical)

Smoke and ash rises as a plume from agricultural field burning, Willamette Valley, Oregon. (MG_7223)

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Storm drain, Washington

Environmental message on storm drain, Washington (MG_7210)

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Beach gravel, Washington (vertical)

rounded cobbles make up much of the sediment on Dungeness Spit, Washington (MG_7145)

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Skagit gneiss migmatite, Washington

Migmatite of Skagit gneiss, North Cascades National Park, Washington (MG_6945)

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Skagit gneiss migmatite, Washington

Migmatite of Skagit gneiss, North Cascades National Park, Washington (MG_6932)

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Eocene granite, Washington (vertical)

Eocene granite of the Golden Horn Batholith, Liberty Bell Mountain, North Cascades National Park, Washington (MG_6905)

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Skagit gneiss, N Cascades, Washington

Skagit gneiss and mountains, North Cascades National Park, Washington (MG_6857)

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Glacial valley, North Cascades, Washington

Glacially eroded, U-shaped valley of the Stehekin River, North Cascades National Park, Washington. (MG_6843)

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Columbia River, central Washington

Columbia River and Sentinel Gap, near Vantage, WA. Lavas of the Columbia River Basalt Group in foreground. (MG_6615)

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Corestone in granitic rock, Montana (Vertical)

Corestone, formed by spheroidal weathering in granitic rock, Montana (170528-6)

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Corestone in granitic rock, Montana

Corestone, formed by spheroidal weathering in granitic rock, Montana (170528-4)

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Grus, disintegrated granitic rock, Montana

Grus, small angular fragments of granitic material formed by chemical (hydrolysis) and mechanical weathering of granitic rock, Montana. Slope of deposit approximates the angle of repose for this material. (170528-3)

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