Cloverly, Morrison, Sundance, and Gypsum Spring Formations (WYKJg;0)

CLOVERLY, MORRISON, AND SUNDANCE (Js), AND GYPSUM SPRING 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. GYPSUM SPRING FORMATION--Interbedded red shale, dolomite, and gypsum. In north Wyoming wedges out south in T. 39 N.

State	Wyoming
Name	Cloverly, Morrison, Sundance, and Gypsum Spring Formations
Geologic age	Phanerozoic \| Mesozoic \| Jurassic-Middle Jurassic-Late(?) Cretaceous-Early
Original map label	KJg
Primary rock type	fine-grained mixed clastic
Secondary rock type	medium-grained mixed clastic
Other rock types	carbonate; mixed clastic/volcanic; conglomerate; dolostone (dolomite); evaporite
Lithologic constituents	Minor Sedimentary > Chemical > Evaporite > Gypsum Sedimentary > Carbonate > Dolostone Sedimentary > Clastic > Mudstone > Shale Sedimentary > Carbonate > Limestone Sedimentary > Clastic > Sandstone Sedimentary > Clastic > Mudstone > Claystone Sedimentary > Clastic > Conglomerate 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	Big Horn - Fremont - Hot Springs - Johnson - Park - Sheridan - Sublette - Teton - Washakie