Cloverly, Morrison, and Sundance Formations (WYKJs;0)

CLOVERLY, MORRISON, AND SUNDANCE (Js) FORMATIONS. CLOVERLY FORMATION--Rusty sandstone at top, underlain by brightly variegated bentonitic claystone; chert-pebble conglomerate locally at base. MORRISON FORMATION--Dully variegated claystone, nodular limestone, and gray silty sandstone. In southern Yellowstone and Jackson Hole areas the presence of Morrison is questionable. SUNDANCE FORMATION--Greenish-gray glauconitic sandstone and shale, underlain by red and gray nonglauconitic sandstone and shale.

State	Wyoming
Name	Cloverly, Morrison, and Sundance Formations
Geologic age	Phanerozoic \| Mesozoic \| Jurassic-Middle Jurassic-Late(?) Cretaceous-Early
Original map label	KJs
Primary rock type	fine-grained mixed clastic
Secondary rock type	medium-grained mixed clastic
Other rock types	limestone; mixed clastic/volcanic; conglomerate
Lithologic constituents	Minor Sedimentary > Clastic > Mudstone > Shale Sedimentary > Carbonate > Limestone Sedimentary > Clastic > Conglomerate Sedimentary > Clastic > Mudstone > Claystone Sedimentary > Clastic > Sandstone Incidental Sedimentary > Chemical > Chert Sedimentary > Clastic > Mudstone > Claystone > Bentonite
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	Albany - Carbon - Converse - Fremont - Johnson - Laramie - Natrona - Park - Platte - Washakie