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SOME POINTERS:

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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!

 


Haul truck in open-pit gold mine, Colorado

Haul truck in open-pit gold mine, Colorado. The truck is capable of carrying 250 tons of rock. (170523-60)

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Ape Cave Lava Tube, Washington (vertical)

Ape Cave Lava Tube, formed in a 2000 year old basaltic lava flow o the south side of Mount St. Helens, Washington (150902-28)

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Ape Cave Lava Tube, Washington

Ape Cave Lava Tube, formed in a 2000 year old basaltic lava flow o the south side of Mount St. Helens, Washington (150902-25)

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Oolitic limestone

close-up view of oolitic limestone of the Proterozoic Johnnie Formation, SE California. Penny for scale. (171109-32) ooliths, spheres

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Pentacrinites crinoids in limestone

Jurassic Pentacrinites crinoid fossils in limestone, Montana (161109-23)

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Oolitic limestone

close-up view of oolitic limestone of the Proterozoic Johnnie Formation, SE California –about 2 cm across. (171109-20)

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Oolitic limestone

close-up view of oolitic limestone of the Proterozoic Johnnie Formation, SE California. Penny for scale. (171109-18)

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Serpentinized peridotite

Serpentinized peridotite –most serpentinite coats the surface on the right side (a fault surface); note the serpentinite-filled fractures cutting the shared edge of the two faces. (161109-14)

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Serpentinized peridotite

Serpentinized peridotite –most serpentinite coats the surface on the right side (a fault surface); note the serpentinite-filled fractures cutting the shared edge of the two faces. (161109-12)

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Apatite crystal in calcite (square)

Euhedral apatite (calcium phosphate) crystal in calcite 161109-10F)

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Effects of soil creep, Oregon

tilted retaining wall from soil creep, Oregon (IP17-4159)

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Effects of soil creep, Oregon

tilted retaining wall from soil creep, Oregon (IP17-4155)

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Mylonitic marble

Facing stone (.5 m across) of marble mylonite. (IP17-3765)

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Uplifted marine terrace, California (Pan)

Uplifted marine terrace, Santa Monica, California. Cliff exposures consist of stream sediments deposted near sea level. (IP17-3540)

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Cracked sidewalk (vertical)

Cracked sidewalk, from ongoing weathering and erosion. (IP17-3502)

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Glacial arete, Montana (Pan)

The Garden Wall, a glacial arete in Glacier National Park, Montana. Bedrock is sedimentary rock of the Proterozoic Belt Supergroup. (IP17-3465)

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Western Cascades, Oregon (Pan)

Eroded andesite of the Western Cascades, Oregon –looking eastward towards stratovolcanoes of the High Cascades. (IP17-3331)

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Shoshone Falls, Idaho (Pan)

Rhyolite of the Twin Falls volcanic field -a 10 Ma caldera of the Yellowstone Hot Spot– exposed at Shoshone Falls, Idaho. Basalt of the Snake River Plain forms the cliffs on the skyline, (IP17-3081)

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Multnomah Falls, Oregon (vertical pan)

Multnomah Falls, Oregon drops more than 600 feet over basalt flows of the Grande Ronde Basalt (IP17-3049)

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Front Range of Northern Colorado

Aerial view of Front Range of northern Colorado, including much of Rocky Mountain National Park. Longs Peak is the prominent peak near the upper center of the photo. (IP17-2793)

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Hogback ridges, Colorado (Vertical)

Aerial view of hogback ridges along edge of Colorado’s Front Range near Boulder, Colorado. Great Unconformity, between Pennsylvanian Fountain Formation and Precambrian basement appears at base of Flatiron in lower part of photo. (IP17-2790)

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