Douglas Group

Shale and limestone. Shale is dark gray to medium gray, red , black, fossiliferous, calcareous and locally sandy. Limestone is dark gray to light gray, thin bedded to thick bedded, fossiliferous and locally sandy. Approx. max thickness 100 ft
State Nebraska
Name Douglas Group
Geologic age Late Pennsylvanian - Virgilian
Lithologic constituents
Major
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Clastic > Mudstone > Shale (Bed)
Comments Includes in decending order: Lawrence Shale, Cass Limestone, and Plattford Shale.
References
NGMDB product
Counties Cass - Douglas - Saunders