Fox Hills Formation

Olive-brown sand, shale, and sandstone; marine shoreline and off-shore sediment; as thick as 120 metres (400 feet).
State North Dakota
Name Fox Hills Formation
Geologic age Upper Cretaceous
Lithologic constituents
Major
Sedimentary > Clastic > Sandstone (Bed)poorly consolidated
Sedimentary > Clastic > Mudstone > Shale (Bed)poorly consolidated
Comments Map unit descriptions mix unconsolidated and sedimentary terms; using sedimentary terms with poorly consolidated according to other sources.
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.

USGS Geologic Names lexicon found at: http://ngmdb.usgs.gov/Geolex/

https://ngmdb.usgs.gov/Geolex/search

NGMDB product
Counties Benson - Bottineau - Bowman - Burleigh - Emmons - Grant - Kidder - Logan - McHenry - McIntosh - McLean - Morton - Pierce - Renville - Rolette - Sheridan - Sioux - Slope - Stutsman - Towner - Wells