Pierre Formation

Dark-gray shale; marine offshore sediment; as thick as 700 metres (2,300 feet).
State North Dakota
Name Pierre Formation
Geologic age Upper Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Mudstone > Shale (Bed)marine offshore sediment
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 Barnes - Benson - Bottineau - Bowman - Burleigh - Cavalier - Dickey - Eddy - Emmons - Foster - Grand Forks - Griggs - Kidder - LaMoure - Logan - McHenry - McIntosh - Morton - Nelson - Pembina - Pierce - Ramsey - Ransom - Rolette - Sargent - Sheridan - Sioux - Slope - Steele - Stutsman - Towner - Walsh - Wells