Chugwater and Dinwoody Formations (WYTRcd;0)

CHUGWATER AND DINWOODY FORMATIONS. CHUGWATER FORMATION--Red siltstone and shale. Alcova Limestone Member in upper middle part. Thin gypsum partings near base. DINWOODY FORMATION--Olive-drab hard dolomitic thin-bedded siltstone.

State	Wyoming
Name	Chugwater and Dinwoody Formations
Geologic age	Phanerozoic \| Mesozoic \| Triassic-Early Triassic-Middle(?) Triassic-Late
Original map label	@cd
Primary rock type	mudstone
Secondary rock type	limestone
Other rock types	evaporite
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale Sedimentary > Clastic > Siltstone Minor Sedimentary > Carbonate > Limestone 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	Fremont - Hot Springs - Natrona - Park - Sublette - Teton - Washakie