Belle Fourche Formation

Medium- to dark-gray, silty to sandy shale; marine offshore sediment; as thick as 105 metres (350 feet).
State North Dakota
Name Belle Fourche Formation
Geologic age Upper Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)silty to sandy shale
References

North Dakota Geological Survey, 2001, Geologic Bedrock Map of North Dakota based on Bluemle, John P., 1983, Geologic and Topographic Bedrock Map of North Dakota, NDGS Miscellaneous Map 25, 1:670,000 scale.

NGMDB product
Counties Cass - Cavalier - Grand Forks - Pembina - Traill - Walsh