Search for any geological feature below
–then click on the image to see a larger version in its correct format, a more detailed caption, and an ID number.
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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.
Or you can just scroll down and see the most recently added photos… Enjoy!
Goose Lake, Oregon-California
Aerial view of Goose Lake, a pluvial lake that crosses the Oregon-California border (140617-207)
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Edge of rhyolite flow, N. California
Aerial view of obsidian (rhyolite) lava flow on Medicine Lake Volcano and Mt. Shasta, northern California (140617-161)
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Obsidian lava flow and Mt. Shasta, California
Aerial view of obsidian lava flow on Medicine Lake Volcano and Mt. Shasta, California (140617-183)
Download ImageObsidian lava flow and Mt. Shasta, California
Aerial view of obsidian lava flow on Medicine Lake Volcano and Mt. Shasta, California (140617-180)
Download ImageMt. Shasta stratovolcano and Shastina, California
Aerial view of Mt. Shasta stratovolcano and its satellite cone, Shastina, California. (140617-114)
Download ImageTokatee Falls, Oregon (vertical)
Tokatee Falls spills through a notch in Quaternary basalt flow. Cascade Range, Oregon. (140616-93)
Download ImageMt. Shasta stratovolcano, California
Aerial view of Mt. Shasta stratovolcano, California. (140617-137)
Download ImageObsidian flow, Medicine Lake Volcano, California
Aerial view of obsidian flow, Medicine Lake Volcano, California (140617-152)
Download ImageTokatee Falls, Oregon
Tokatee Falls spills through a notch in Quaternary basalt flow. Cascade Range, Oregon. (140616-92)
Download ImageEocene fossil clams, Oregon
Eocene fossil clams (pelecypods) in Umpqua Group, Oregon. (140616-1)
Download ImageTokatee Falls, Oregon (square)
Tokatee Falls spills through a notch in Quaternary basalt flow. Cascade Range, Oregon. (140616-61)
Download ImageHoneycomb weathering in sandstone
The small holes in this rock are called tafoni –and they typically form through the growth of salt crystals that loosen the grains to create small pockets in the rock. Once the pocket forms, more seawater can collect to deposit more salt. It’s an example of a positive feedback loop. These rocks are part of the Eocene Coaledo Formation, Oregon. (140608-90)
Download ImageCoastal Erosion, Oregon
Erosion of dipping Eocene sedimentary rocks, (Coaledo Formation) along Oregon Coast. Shoreacres State Park, Oregon. (140608-108)
Download ImageHoneycomb weathering in sandstone
The small holes in this rock are called tafoni –and they typically form through the growth of salt crystals that loosen the grains to create small pockets in the rock. Once the pocket forms, more seawater can collect to deposit more salt. It’s an example of a positive feedback loop. These rocks are part of the Eocene Coaledo Formation, Oregon. (140608-91)
Download ImageErosion along dipping strata, Oregon
East-dipping Eocene Coaledo Formation. The resistant beds protrude above ground level higher than the recessive ones. Sunset Bay, Oregon. (140608-95)
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Paddleboarder on Oregon Coast
Fog near Sunset Bay on Oregon Coast. Headland in background. (140608-78)
Download ImageConglomerate of Troutdale Formation, Portland, Oregon
Exposure of Troutdale Formation, deposited by the Ancestral Columbia River, along the Willamette River in downtown Portland, Oregon. (140526-29)
Download ImageHoneycomb Weathering (Tafoni) in sandstone
The small holes in this rock are called tafoni –and they typically form through the growth of salt crystals that loosen the grains to create small pockets in the rock. Once the pocket forms, more seawater can collect to deposit more salt. It’s an example of a positive feedback loop. These rocks are part of the Eocene Coaledo Formation, Oregon. (140608-60)
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