Davis Formation
Davis Formation | |
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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
- ^ 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
- ^ a b 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.
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