Greenhorn Formation and Belle Fourche and Mowry Shale (WYKgbm;0)

Greenhorn Formation and Belle Fourche and Mowry Shale

Greenhorn Formation - Light-colored limestone, marl, and limy sandstone interbedded with gray concretionary shale. Belle Fourche Shale - Black soft bentonitic concretionary shale. Mowry Shale (Kmr) - Silvery-gray hard siliceous shale containing abundant fish scales and bentonite beds.

State	Wyoming
Name	Greenhorn Formation and Belle Fourche and Mowry Shale
Geologic age	Lower Cretaceous
Lithologic constituents	Major Sedimentary > Clastic > Mudstone > Shale Minor Sedimentary > Clastic > Sandstone Sedimentary > Carbonate > Limestone Unconsolidated > Marl Incidental Sedimentary > Clastic > Mudstone > Claystone > Bentonite
References	Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000. https://pubs.er.usgs.gov/publication/70046739
NGMDB product	NGMDB product page for 16366
Counties	Crook - Niobrara - Weston

Greenhorn Formation and Belle Fourche and Mowry Shale

Love, J.D. and Christiansen, A.C., 1985, Geologic Map of Wyoming: U.S. Geological Survey, scale 1:500,000.