Davis Formation

Davis Formation Stratigraphic range: Upper Cambrian
Type	Formation
Unit of	Elvins Group (in Missouri)
Underlies	Derby-Doerun Dolomite
Overlies	Bonneterre Formation
Thickness	170 ft. average, 225 ft. maximum
Lithology
Primary	Shale, Siltstone
Other	Sandstone, dolostone, limestone conglomerate
Location
Region	Indiana and Missouri
Country	United States
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.