Sundance and Gypsum Spring Formations (WYJsg;0)

SUNDANCE (Js) AND GYPSUM SPRING FORMATIONS. 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	Sundance and Gypsum Spring Formations
Geologic age	Phanerozoic \| Mesozoic \| Jurassic-Middle Jurassic-Late
Original map label	Jsg
Primary rock type	sandstone
Secondary rock type	shale
Other rock types	dolostone (dolomite); evaporite
Lithologic constituents	Minor Sedimentary > Carbonate > Dolostone Sedimentary > Clastic > Mudstone > Shale Sedimentary > Clastic > Sandstone Incidental Sedimentary > Chemical > Evaporite > Gypsum
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 - Crook - Fremont - Hot Springs - Johnson - Natrona - Niobrara - Park - Sheridan - Sublette - Teton - Washakie - Weston