Skip to main content

Aspen Shale

ASPEN SHALE--Light- to dark-gray siliceous tuffaceous shale and siltstone, thin bentonite beds, and quartzitic sandstone.
State Wyoming
Name Aspen Shale
Geologic age Phanerozoic | Mesozoic | Cretaceous-Early
Primary rock type mudstone
Secondary rock type mixed clastic/volcanic
Other rock types sandstone
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Siltstone
Minor
Sedimentary > Clastic > Mudstone > Claystone > Bentonite
Sedimentary > Clastic > Sandstone
Incidental
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 Lincoln - Sublette - Teton - Uinta