Washakie Formation

Washakie Formation
Stratigraphic range: Lutetian (Bridgerian-Uintan) ~48–42 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Sub-units	Adobe Town & Kinney Rim members
Lithology
Primary	Sandstone
Location
Coordinates	41°42′N 109°00′W / 41.7°N 109.0°W / 41.7; -109.0
Approximate paleocoordinates	45°36′N 95°06′W / 45.6°N 95.1°W / 45.6; -95.1
Region	Colorado & Wyoming
Country	United States
Extent	Sand Wash & Washakie Basins
Washakie Formation (the United States) Show map of the United States Washakie Formation (Wyoming) Show map of Wyoming

The Washakie Formation is a geologic formation in northern Colorado and southern Wyoming. It preserves many mammal, bird, reptile and other fossils dating back to the Lutetian stage of the Eocene within the Paleogene period. The sediments fall in the Bridgerian and Uintan stages of the NALMA classification.^[1]