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

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
Primary rock type fine-grained mixed clastic
Secondary rock type limestone
Other rock types sandstone; evaporite
Lithologic constituents
Minor
Sedimentary > Clastic > Siltstone
Sedimentary > Clastic > Sandstone
Sedimentary > Carbonate > Limestone
Sedimentary > Clastic > Mudstone > Claystone
Incidental
Sedimentary > Chemical > Evaporite > Gypsum
Sedimentary > Chemical > Evaporite > Salt
Map references
Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey.
Unit references
Love, J.D. and Christiansen, Ann Coe, 1985, Geologic Map of Wyoming: U.S. Geological Survey.
Counties Lincoln - Sublette - Teton - Uinta