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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”).
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Pumice Deposit
Pumice deposit at Crater Lake in Oregon. Differently colored pumice from differences in iron-oxide content (Image ID# 5d-8638)
Download ImageSalt-covered playa, southern Oregon
Polygonal cracks in salt deposits at Lake Abert in Central Oregon. (Image ID# 140620-102)
Download ImageBirds along briney creek, Lake Abert, Oregon
Due to the high salinity and alkali content, Lake Albert is uninhabitable for fish. However, this environment is perfect for brine shrimp and as a result, the lake provides an excellent habitat for a variety of shore birds. (Image ID# 140621-103)
Download Imagecross-cutting relations in canyon wall
Cross-cutting relations in canyon wall on west side of Panamint Valley in SE California –part of Death Valley National Park. (Image ID#rainbowunconf-noteslr)
Download Imagecross-cutting relations (pan)
Cross-cutting relations in canyon wall on west side of Panamint Valley in SE California –part of Death Valley National Park. (Image ID# pan-rainbowunconf)
Download ImageSawtooth Peak
Sawtooth Peak (right) capped by Columbia River Basalt. Beneath it is granite of the Wallow Batholith –and off to the left, are the bedded rocks of the Martin Bridge Limestone. (Image ID# 140713-43s)
Download ImageWallowa Mountains, Oregon
The Wallowa Mountains rise along a fault zone just south of the town of Joseph, Oregon. (Image ID# 100624-15lr)
Download ImageMudcracks and Ripple Marks
Mudcracks (left) and ripple marks (right) in rock of the Belt Supergroup. (Image ID# belt-sedsrs-pic)
Download ImageProterozoic stromatolite (vertical)
Proterozoic Helena Formation stromatolite. (Image ID# 090717-33)
Download ImageEarthquake Damage, New Zealand
A home left balancing on the edge of a cliff after the cliff failed during an earthquake in Christchurch, New Zealand. Note the Exposed basalt-filled channel and the shipping containers along the highway to mitigate further sliding or rockfall 140127-28)
Download ImageGranite intruding Gneiss
1.4 billion year old granite intruding 1.7 billion year old gneiss. (Image ID# ig-23)
Download ImageGlacial Cirques, Colorado
Ice-sculpted Upper Glacier Gorge, a glacial cirque in Colorado. This photo shows a tarn, two cirques and two aretes. The peak on the left, the Spearhead, is the end of one arete, the other is the sunlit ridge in the right background. (Image ID# 140809-94)
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Tilted nonconformity, Montana
Cambrian Flathead Sandstone overlying Proterozoic gneiss in Southwest Montana. Note the pegmatite dike in the gneiss and the basal conglomerate in the sandstone. A nonconformity is a type of unconformity in which sedimentary rock depositionally overlies intrusive igneous or metamorphic rock. (Image ID# 100629-37)
Download ImageGreat Unconformity in Wyoming
The yellow arrow points to the contact between the Cambrian Sandstone and underlying Precambrian metamorphic rock. (Image ID# sru-14e)
Download ImageGneiss close-up
This hand sample of gneiss shows crystals that formed in the same orientation, as a result of recrystallization while under directed pressure. (Image ID# met-09)
Download ImagePaleozoic Rock, Mojave Desert, CA
Paleozoic Rock of the Resting Spring Range as seen from the Amargosa Valley. The red-brown colored strata near the base of the photo belong to the Cambrian Cararra Formation while the overlying gray limestone belongs to the Cambrian Bonanza King Formation. (Image ID# 101218-38)
Download ImageIntrusive Contact
Cretaceous granodiorite intruding roof pendant of Cambrian metasedimentary rock in the Sierra Nevada Range, California. (Image ID# ig-05)
Download ImageCretaceous Batholiths
Map of Granitic Batholiths of Cretaceous age in western North America (Image ID# k-batholiths)
Download ImageCretaceous granodiorite: Mt. Whitney, CA
Sunrise over Mt. Whitney in Sierra Nevada, the highest summit in California by elevation. (Image ID# ig-02)
Download ImageVolcanic Rock Samples
From left to right, these rocks are arranged in order of decreasing silica content: rhyolite, andesite, and basalt. (Image ID# ig-85)
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