Demopolis Chalk Formation

Demopolis Chalk Stratigraphic range: Upper Cretaceous
Type	Geological formation
Unit of	Selma Group
Sub-units	Bluffport Marl Member
Underlies	Ripley Formation
Overlies	Mooreville Chalk Formation
Lithology
Primary	Chalk
Location
Region	Alabama, Mississippi, Tennessee
Country	United States
Type section
Named for	Demopolis, Alabama

The Demopolis Chalk is a geological formation in North America, within the U.S. states of Alabama, Mississippi, and Tennessee. The chalk was formed by pelagic sediments deposited along the eastern edge of the Mississippi embayment during the middle Campanian stage of the Late Cretaceous. It is a unit of the Selma Group and consists of the upper Bluffport Marl Member and a lower unnamed member.Dinosaur and mosasaur remains are among the fossils that have been recovered from the Demopolis Chalk.