Fossil Butte National Monument is a United States National Monument managed by the National Park Service, located 15 miles west of Kemmerer, Wyoming, United States. It centers on an assemblage of Eoce
Fossil Butte National Monument
This 1.7-meter (5 foot 6 inch) Axestemys byssinus is one of the largest turtles known from Fossil Lake.
Stingray prepared by R. Lee Craig (Asterotrygon maloneyi). In the collection of Fossil Shack. Prepared circa 1920.
†Chaneya tenuis
Green River Formation
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The Green River Formation is an Eocene geologic formation that records the sedimentation in a group of intermountain lakes in three basins along the present-day Green River in Colorado, Wyoming, and U
Green River Formation exposed in the cliffs at Fossil Butte
Heliobatis radians (stingray), Green River Formation, Fossil Butte National Monument
Unnamed middle member, Green River Formation along U.S. Highway 191 near Indian Canyon Summit, Duchesne County, Utah
Diplomystus (left) and Knightia (right), two fossil fish from one of the lake beds in the Green River Formation