Selma Group

The Selma Group is a geological group in North America, within the U.S. states of Alabama, Mississippi, and Tennessee. The strata date from the Santonian to the Maastrichtian stages of the Late Cretaceous. The group is composed of, in ascending order, the Mooreville Chalk Formation, Demopolis Chalk Formation, Ripley Formation, and Prairie Bluff Chalk Formation. Dinosaur and mosasaur remains are among the fossils that have been recovered from the Selma Group.^[1][2]

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	Glauconitic sandstone
Location
Region	Alabama, Georgia, Mississippi, Tennessee
Country	United States
Type section
Named for	Selma, Alabama

Stratigraphic column for the Selma

Oil was discovered in 1939 within the Late Cretaceous Woodruff Sandstone within the Selma Chalk Formation. Known as Mississippi's first oil field, the Tinsley Oil Field is located adjacent to Tinsley, Mississippi.^[3]

See also

• Paleontology portal

• List of dinosaur-bearing rock formations