U.S. Geological Survey:
Hidden Lake
U.S. Geological Survey:
#ThrowBackThursday: Little Annie
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Cliffs on the Rio Grande River
U.S. Geological Survey:
Lava Spattering
U.S. Geological Survey:
The Bison
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Echinus Geyser in Norris Geyser Basin, Yellowstone National Park
U.S. Geological Survey:
Yosemite Falls
U.S. Geological Survey:
TBT — Shepard Glacier (1913)
U.S. Geological Survey:
Fog Clears Around El Capitan, Yosemite National Park, California
U.S. Geological Survey:
You Looking at Me? Mountains goats in Glacier National Park, Montana
U.S. Geological Survey:
Lower Falls of the Yellowstone River, Yellowstone National Park, Wyoming
U.S. Geological Survey:
Curious Fellow
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Mount Rainier
U.S. Geological Survey:
We Have a Lava Love for Ya!
U.S. Geological Survey:
Three Sisters
U.S. Geological Survey:
Mauna Loa: A Stirring Giant?
U.S. Geological Survey:
El Capitan
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Happy Anniversary Colorado
U.S. Geological Survey:
TBT: Glacier National Park, MT with Game McGimsey on the summit of Mount Cleveland,1983
U.S. Geological Survey:
Conserving the North American bison
U.S. Geological Survey:
Acadia National Park
U.S. Geological Survey:
Happy Anniversary Hawaii
U.S. Geological Survey:
Denali Fault
U.S. Geological Survey:
Garden Wall Weather Station, MT
U.S. Geological Survey:
Rainbow Point
U.S. Geological Survey:
"This means something. This is important"
U.S. Geological Survey:
For the Geology Geeks
U.S. Geological Survey:
Boxwork
U.S. Geological Survey:
Climate Change and Bear Foods
U.S. Geological Survey:
Would You Believe Late Spring in Glacier National Park?