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Lewis Shale

LEWIS SHALE (AGE ABOUT 68 Ma)--Gray marine shale containing many gray and brown lenticular concretion-rich sandstone beds.
StateWyoming
NameLewis Shale
Geologic agePhanerozoic | Mesozoic | Cretaceous-Late
Original map labelKle
Primary rock typeshale
Secondary rock typesandstone
Other rock types
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale
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 coverageAlbany - Carbon - Converse - Fremont - Natrona - Sweetwater

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