Davis Formation

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

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

See also

• Paleontology portal

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