Stump Formation, Preuss Sandstone or Redbeds, and Twin Creek Limestone (WYJst;0)

STUMP FORMATION, PREUSS SANDSTONE or REDBEDS, and TWIN CREEK LIMESTONE. STUMP FORMATION--Glauconitic siltstone, sandstone, and limestone. PREUSS SANDSTONE OR REDBEDS--Purple, maroon, and reddish-gray sandy siltstone and claystone; contains salt and gypsum in thick beds in some subsurface sections. TWIN CREEK LIMESTONE--Greenish-gray shaly limestone and limy siltstone. Includes Gypsum Spring Member.

State	Wyoming
Name	Stump Formation, Preuss Sandstone or Redbeds, and Twin Creek Limestone
Geologic age	Phanerozoic \| Mesozoic \| Jurassic-Middle Jurassic-Late
Original map label	Jst
Primary rock type	fine-grained mixed clastic
Secondary rock type	limestone
Other rock types	sandstone; evaporite
Lithologic constituents	Minor Sedimentary > Clastic > Mudstone > Claystone Sedimentary > Carbonate > Limestone Sedimentary > Clastic > Sandstone Sedimentary > Clastic > Siltstone Incidental Sedimentary > Chemical > Evaporite > Salt 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	Lincoln - Sublette - Teton - Uinta