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Bullion Creek Formation

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Yellowish-brown silt, sand, clay, sandstone, and lignite; river, lake, and swamp sediment; as thick as 200 metres (600 feet).
State North Dakota
Name Bullion Creek Formation
Geologic age Paleocene
Lithologic constituents
Major
Sedimentary > Clastic > Siltstone (Bed)poorly consolidated
Sedimentary > Clastic > Mudstone > Claystone (Bed)poorly consolidated
Minor
Sedimentary > Clastic > Sandstone (Bed)poorly consolidated
Incidental
Sedimentary > Carbonate > Limestone (Bed)
Sedimentary > Coal > Lignite (Bed)ND003 - occurs as micritic lenses from 60-200 cm thick and extending up to a few meters laterally; most common is uppermost part of Bullion Creek.
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.

Clausen, E. N., and Kihm, A. J., eds., 1986, Tertiary and Upper Cretaceous of south-central and western North Dakota Field Trip Guidebook, North Dakota Geological Society.
NGMDB product
Counties Adams - Billings - Bowman - Burke - Burleigh - Divide - Dunn - Golden Valley - Grant - Hettinger - McHenry - McKenzie - McLean - Mercer - Morton - Mountrail - Oliver - Renville - Slope - Stark - Ward - Williams