| Selma Group | |
|---|---|
| Stratigraphic range:Upper Cretaceous | |
 Prairie Bluff Chalk Formation of the Selma Group exposed in Starkville, Mississippi. | |
| Type | Geological formation |
| Sub-units | Mooreville Chalk Formation Demopolis Chalk Formation Ripley Formation Prairie Bluff Chalk Formation |
| Underlies | Midway Group |
| Overlies | Eutaw Formation |
| Lithology | |
| Primary | Chalk |
| Other | Glauconiticsandstone |
| Location | |
| Region | Alabama,Georgia,Mississippi,Tennessee |
| Country | United States |
| Type section | |
| Named for | Selma, Alabama |
TheSelma Group is a geologicalformation in North America, within theU.S. states ofAlabama,Mississippi, andTennessee. The strata date from theSantonian to theMaastrichtian stages of theLate Cretaceous. The group is composed of, in ascending order, theMooreville Chalk Formation,Demopolis Chalk Formation,Ripley Formation, andPrairie Bluff Chalk Formation.Dinosaur andmosasaur remains are among the fossils that have been recovered from the Selma Group.[1][2]
Oil was discovered in 1939 within theLate Cretaceous WoodruffSandstone within the Selma ChalkFormation. Known as Mississippi's first oil field, theTinsley Oil Field is located adjacent toTinsley, Mississippi.[3]
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