Green River Formation: Wilkins Peak Member and Tipton Shale member or Tongue (WYTgwt;0)

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
Original map label	Tgwt
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 > Mudstone > Shale > Oil-shale Sedimentary > Carbonate > Marlstone Sedimentary > Clastic > Mudstone > Shale Sedimentary > Clastic > Sandstone Incidental Igneous > Volcanic (Pyroclastic, tuff) Sedimentary > Chemical > Evaporite
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	Sweetwater