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Wind River Formation and Indian Meadows Formations

WIND RIVER AND INDIAN MEADOWS FORMATIONS. 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 Phanerozoic | Cenozoic | Tertiary | Eocene
Primary rock type fine-grained mixed clastic
Secondary rock type medium-grained mixed clastic
Other rock types carbonate; conglomerate
Lithologic constituents
Minor
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Conglomerate
Sedimentary > Carbonate > Limestone
Incidental
Sedimentary > Coal
Igneous > Volcanic (Pyroclastic, tuff)
Map references
Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey.
Unit references
Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey.
Counties Fremont