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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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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Mississippi River Delta, Louisiana
Aerial view of mouth of Mississippi River Delta, Louisiana (IP17-2749)
Download ImageCross-bedded sandstone (vertical)
Cross-bedded, coarse-grained sandstone, right-side up. (IP17-2535)
Download ImageSheath fold in gneiss (vertical)
Sheath fold in gneiss, about .5 m across (IP17-2533)
Download ImageTilted Columbia River Basalt, Washington (Pan)
Angular unconformity between tilted Miocene Grande Ronde Basalt and flat-lying Quaternary Underwood Basalt (high on left), Washington. (IP16-1662)
Download ImageHogback fins, Colorado
Erosional remnants of vertically dipping sandstone of the Permian Lyons Formation in Garden of the Gods, Colorado. The erosion produced narrow hogback fins. (IP16-1593)
Download ImageCross-bedded arkosic sandstone (vertical)
Cross-bedded, coarse-grained arkosic sandstone of the Pennsylvanian Fountain Formation, Colorado. Rocks get younger towards the left. Photo is about 1 meter across. (IP16-1582)
Download ImageCross-bedded arkosic sandstone
Cross-bedded, coarse-grained arkosic sandstone of the Pennsylvanian Fountain Formation, Colorado (IP16-1581)
Download ImageEffects of soil creep, Oregon (vertical)
tilted retaining wall from soil creep, Oregon (IP17-4154)
Download ImageSlackwater deposits, Washington
Slackwater sediments, deposited in temporary lakes formed during the Ice Age (Missoula) floods, Washington. (IP16-3816)
Download ImageGrinnell Fm and Clark Fork, Montana
Proterozoic Grinnell Formation (sandstone) of the Belt Supergroup cropping out in the Clark Fork, the main river that drains NW Montana. (IP16-3580)
Download ImageGrinnell Fm and Clark Fork, Montana (vertical)
Proterozoic Grinnell Formation (sandstone) of the Belt Supergroup cropping out in the Clark Fork, the main river that drains NW Montana. (IP16-3580)
Download ImageGrinnell Fm and Clark Fork, Montana
Proterozoic Grinnell Formation (sandstone) of the Belt Supergroup cropping out in the Clark Fork, the main river that drains NW Montana. (IP16-3580)
Download ImageSteeply dipping sandstone, Olympic Coast, Washington (IP16-3491)
Steeply dipping Eocene sandstone, Olympic coast, Washington IP16-3491)
Download ImageDry Falls Cataract, Washington (Pan)
Dry Falls Cataract, Washington, formed by catastrophic erosion of Columbia River Basalt Group lava flows in lower Grand Coulee by the Ice Age (Missoula) Floods. (IP16-3808)
Download ImageEocene Ginkgo leaf (square)
fossilized Eocene Ginkgo leaf, Republic, Washington (IP16-3782)
Download ImageRounded river boulders, Oregon
Rounded boulders and cobbles along North Fork Willamette River, Oregon. (IP-1045)
Download ImageCrater Lake caldera, Oregon (Pan)
Crater lake fills the caldera of Mt. Mazama, a Cascade stratovolcano that erupted catastrophically 7700 years ago. Wizard Island, an andesitic cinder cone, forms the island. Crater Lake National Park, Oregon. (IP-0533)
Download ImageHand samples of metamorphic rocks
From left to right (in order of increasing grade) slate, phyllite, schist, gneiss. (Met-01)
Download Image
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