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Wind River Formation and Indian Meadows Formations

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Wind River Formation (Central Wyoming (Twdr2)) - Variegated claystone and sandstone; lenticular conglomerate. Age of tuff at top 49 Ma. Indian Meadows Formation (Twim) - Red to variegated claystone, sandstone, and algal-ball(?) limestone; some beds of large Paleozoic boulders and detachment masses of Paleozoic and Mesozoic rocks.
State Wyoming
Name Wind River Formation and Indian Meadows Formations
Geologic age Eocene
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Sandstone
Minor
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Conglomerate
References

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.

https://pubs.er.usgs.gov/publication/70046739
NGMDB product
Counties Fremont