U.S. Geological Survey:
Shiprock
U.S. Geological Survey:
El Capitan
U.S. Geological Survey:
TBT Carlsbad Caverns 1923
U.S. Geological Survey:
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:
Nanushuk Formation, Tuktu Bluff
U.S. Geological Survey:
Leaning Tower of Rock
U.S. Geological Survey:
Anticlines and Synclines
U.S. Geological Survey:
Waterfall
U.S. Geological Survey:
Sipapu Natural Bridge
U.S. Geological Survey:
Klondike Gold Rush
U.S. Geological Survey:
Carlsbad Caverns Natural Entrance
U.S. Geological Survey:
Capitol Reef Cliff
U.S. Geological Survey:
Rainbow Point
U.S. Geological Survey:
Winter Snows
U.S. Geological Survey:
Happy Statehood Day Kansas!
U.S. Geological Survey:
Butler Wash Bridge
U.S. Geological Survey:
Gold Rush
U.S. Geological Survey:
Colorful Mountains
U.S. Geological Survey:
Ground Control to Major Tom
U.S. Geological Survey:
Enchanted Rock
U.S. Geological Survey:
Lava Sampling
U.S. Geological Survey:
Lincoln Assassinated
U.S. Geological Survey:
Datatron-205 Computer
U.S. Geological Survey:
The Legacy of David A. Johnston
U.S. Geological Survey:
Peralta Canyon
U.S. Geological Survey:
"This means something. This is important"
U.S. Geological Survey:
Faces by the Sea
U.S. Geological Survey:
For the Geology Geeks
U.S. Geological Survey:
North Dakota and South Dakota Statehood
