Jelm, Lykins, Lyons, and Satanka Fms

Red siltstone, shale, and sandstone
State Colorado
Name Jelm, Lykins, Lyons, and Satanka Fms
Geologic age Triassic-Permian
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone
Sedimentary > Clastic > Mudstone > Shale
Sedimentary > Clastic > Siltstone
Minor
Sedimentary > Carbonate > Limestone
References

Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.

NGMDB product
Counties Grand - Larimer