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Colter Formation

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Dull-green and gray tuff, volcanic conglomerate, and sandstone.
State Wyoming
Name Colter Formation
Geologic age Miocene
Lithologic constituents
Major
Igneous > Volcanic (Pyroclastic-tuff)
Sedimentary > Clastic > Conglomeratevolcanic conglomerate
Sedimentary > Clastic > Sandstone
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 Teton