Davis Formation

Davis Formation
Stratigraphic range: Upper Cambrian
Ocnerorthis monticola, fossil from the Davis Formation in Missouri
Type	Formation
Unit of	Elvins Group (in Missouri)[1] and Munising Group (in Indiana)
Underlies	Derby-Doerun Dolomite and Potosi Dolomite
Overlies	Bonneterre Formation
Thickness	170 ft. average, 225 ft. maximum[2]
Lithology
Primary	Shale, Siltstone
Other	Sandstone, dolomite, limestone conglomerate[2]
Location
Country	United States
Extent	Illinois, Indiana, Minnesota, and Missouri
Type section
Named for	Outcrops along Davis Creek, St. Francois County, Missouri

The Davis Formation is a geologic formation in Indiana and Missouri. It preserves fossils dating back to the Cambrian period.

See also

• List of fossiliferous stratigraphic units in Indiana
• List of fossiliferous stratigraphic units in Missouri

References

1. Thompson, Thomas L., 2001, Lexicon of Stratigraphic Nomenclature in Missouri, Missouri Department of Natural Resources, Division of Geology and Land Survey, Report of Investigation Number 73, p 79
2. Howe, W. B. and J. W. Koenig, The Stratigraphic Section in Missouri, Missouri Geological Survey, 1961, p. 18

Sources

• Kleeschulte, Michael J.; Seeger, Cheryl M. (2003). "Davis Formation". Water-resources Investigations Report. US Geological Survey. pp. 11–15. Retrieved 2024-08-22.
• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.