| Davis Formation | |
| Type: | Formation |
| Age: | Upper Cambrian |
| Period: | Cambrian |
| Prilithology: | Shale, Siltstone |
| Otherlithology: | Sandstone, dolomite, limestone conglomerate[1] |
| Namedfor: | Outcrops along Davis Creek, St. Francois County, Missouri |
| Country: | United States |
| Unitof: | Elvins Group (in Missouri)[2] and Munising Group (in Indiana) |
| Underlies: | Derby-Doerun Dolomite and Potosi Dolomite |
| Overlies: | Bonneterre Formation |
| Thickness: | 170 ft. average, 225 ft. maximum |
| Extent: | Illinois, Indiana, Minnesota, and Missouri |
The Davis Formation is a geologic formation in Indiana and Missouri. It preserves fossils dating back to the Cambrian period.