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SOME POINTERS:

Photos typically include their locations, so you can use locations as keywords too. You get more hits with shorter words, and fewer hits as you become increasingly specific with increasing numbers of keywords. It’s best to use singular rather than plural (eg “volcano” instead of “volcanoes”).

As some words are included in others (“salt” within “basalt,” for example) you might want to be more specific to avoid getting a bunch of irrelevant photos.

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5332 images found

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The Pinnacles, Crater Lake, OR (vertical)

Pyroclastic flow (Ash flow tuff) from the 7700BP eruption of Mt. Mazama at the Pinnacles, Crater Lake National Park, Oregon (08-8644)

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Flow-banded rhyolite, Crater Lake, OR (vertical)

Flow-banded rhyolite (with obsidian), Crater Lake National Park, Oregon (08-8640)

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Close-up view of pumice

Close-up view of pumice, a highly porous volcanic rock. It’s made of glass shards fused together during explosive eruptions. (110405-A5895)

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Russell Glacier on Mt. Jefferson, Oregon

Russell Glacier and crevasses on Mt. Jefferson, an eroded Cascade stratovolcano, Oregon (5D-8290)

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Folded ribbon chert , Oregon

Folded ribbon chert of the Franciscan Assemblage, Rainbow Rock, southern Oregon coast (190504-91)

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South Falls, Silver Falls State Park, Oregon

South Falls spills over a flow of Wanapum Basalt at Silver Falls State Park, Oregon. The Alcove behind the falls formed by differential erosion of a recessive sedimentary rock unit between it and the underlying Grande Ronde Basalt. (190420-37)

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Basalt at Middle N Falls, Silver Falls, OR (square)

Grande Ronde Basalt at Middle North Falls, Silver Falls State Park, Oregon (150119-83)

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Waterfall and Wanapum basalt, Oregon (vertical)

North Falls at Silver Falls State Park, Oregon. It spills over a flow of Wanapum Basalt. The alcove behind the falls is eroded along recessive sedimentary rocks that lie between the Wanapum and underlying Grande Ronde Basalt. (150119-24)

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