Wind River Formation

Northwest Wyoming (Jackson Hole) - Variegated red and white claystone and siltstone; largely nontuffaceous except near the top; lenticular coal unit in middle. At base locally includes equivalent of Indian Meadows Formation. Central Wyoming - Variegated claystone and sandstone; lenticular conglomerate. Age of tuff at top 49 Ma.
State Wyoming
Name Wind River Formation
Geologic age Eocene
Lithologic constituents
Sedimentary > Clastic > Mudstone > Claystone (Tuffaceous)tuffaceous at top
Sedimentary > Clastic > Conglomerate
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Siltstone
Sedimentary > Coal
NGMDB product
Counties Albany - Carbon - Fremont - Hot Springs - Natrona - Sublette - Teton