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Cody Shale

CODY SHALE (AGE 78 TO 83 Ma) northern Yellowstone area--Gray to brown shale and siltstone; north and south Wyoming--Dull-gray shale, gray siltstone, and fine-grained gray sandstone.
State Wyoming
Name Cody Shale
Geologic age Phanerozoic | Mesozoic | Cretaceous-Late (78-83 Ma)
Primary rock type shale
Secondary rock type siltstone
Other rock types sandstone
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Siltstone
Minor
Sedimentary > Clastic > Sandstone
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 Big Horn - Carbon - Converse - Fremont - Hot Springs - Johnson - Natrona - Park - Sheridan - Sublette - Sweetwater - Teton - Washakie