Davis Formation

{{Short description|Geologic formation in Indiana and Missouri, United States}}

{{Infobox rockunit

| name = Davis Formation

| image = Ocnerorthis monticola.jpg

| caption = Ocnerorthis monticola, fossil from the Davis Formation in Missouri

| type = Formation

| age = Upper Cambrian

| period = Cambrian

| prilithology = Shale, Siltstone

| otherlithology = Sandstone, dolomite, limestone conglomerateHowe, W. B. and J. W. Koenig, The Stratigraphic Section in Missouri, Missouri Geological Survey, 1961, p. 18

| namedfor = Outcrops along Davis Creek, St. Francois County, Missouri

| namedby =

| region =

| country = United States

| coordinates =

| unitof = Elvins Group (in Missouri)[http://www.dnr.mo.gov/geology/geosrv/ogc/docs/RI-073.pdf 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] and Munising Group (in Indiana)

| subunits =

| underlies = Derby-Doerun Dolomite and Potosi Dolomite

| overlies = Bonneterre Formation

| thickness = 170 ft. average, 225 ft. maximum

| extent = Illinois, Indiana, Minnesota, and Missouri

| area =

| map =

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}}

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