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Green River Formation: Wilkins Peak Member and Tipton Shale member or Tongue

GREEN RIVER FORMATION Wilkins Peak Member (age about 49 Ma) (green, brown, and gray tuffaceous sandstone, shale, and marlstone; contains evaporites in subsurface sections) and Tipton Shale Member or Tongue (oil shale and marlstone).
State Wyoming
Name Green River Formation: Wilkins Peak Member and Tipton Shale member or Tongue
Geologic age Phanerozoic | Cenozoic | Tertiary | Eocene
Primary rock type mixed clastic/carbonate
Secondary rock type fine-grained mixed clastic
Other rock types mixed clastic/volcanic; evaporite; oil shale
Lithologic constituents
Minor
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Carbonate > Marlstone
Sedimentary > Clastic > Mudstone > Shale > Oil-shale
Incidental
Sedimentary > Chemical > Evaporite
Igneous > Volcanic (Pyroclastic, tuff)
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 Sweetwater