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	Middle Jurassic-Upper Jurassic
Lithologic constituents	Major Sedimentary > Carbonate > Limestone Sedimentary > Clastic > Sandstone Sedimentary > Clastic > Siltstone (Glauconitic) Minor Sedimentary > Clastic > Mudstone > Claystone Incidental Sedimentary > Chemical > Evaporite > Salt Sedimentary > Chemical > Evaporite > Gypsum
References	Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000. https://pubs.er.usgs.gov/publication/70046739
NGMDB product	NGMDB product page for 16366
Counties	Lincoln - Sublette - Teton - Uinta

Stump Formation, Preuss Sandstone or Redbeds, and Twin Creek Limestone

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.