Meeteetse Formation and Lewis Shale (WYKml;0)

MEETEETSE FORMATION AND LEWIS SHALE. MEETEETSE FORMATION (AGE ABOUT 73 Ma) (Km)--Chalky-white to gray sandstone, yellow, green, and dark-gray bentonitic claystone, white tuff, and thin coal beds. LEWIS SHALE (AGE ABOUT 68 Ma) (Kle)--Gray marine shale containing many gray and brown lenticular concretion-rich sandstone beds.

State	Wyoming
Name	Meeteetse Formation and Lewis Shale
Geologic age	Phanerozoic \| Mesozoic \| Cretaceous-Late
Original map label	Kml
Primary rock type	medium-grained mixed clastic
Secondary rock type	fine-grained mixed clastic
Other rock types	mixed clastic/volcanic; coal
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Claystone Sedimentary > Clastic > Mudstone > Shale Sedimentary > Clastic > Sandstone Incidental Sedimentary > Clastic > Mudstone > Claystone > Bentonite Sedimentary > Coal Igneous > Volcanic (Pyroclastic, tuff)
Map references	Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey. [http://pubs.er.usgs.gov/publication/ofr83802]
Unit references	Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey. [http://pubs.er.usgs.gov/publication/ofr83802]
Geographic coverage	Fremont - Natrona