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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.
StateWyoming
NameWind River Formation and Indian Meadows Formations
Geologic agePhanerozoic | Cenozoic | Tertiary | Eocene
Original map labelTwim
Primary rock typefine-grained mixed clastic
Secondary rock typemedium-grained mixed clastic
Other rock typescarbonate; conglomerate
Lithologic constituents
Minor
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Mudstone > Claystone
Sedimentary > Clastic > Conglomerate
Incidental
Igneous > Volcanic (Pyroclastic, tuff)
Sedimentary > Coal
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.
Geographic coverageFremont

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URL: http://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=WYTwim;0
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