Demopolis Chalk

Demopolis Chalk
Stratigraphic range: Upper Cretaceous
TypeGeological formation
Unit ofSelma Group
Sub-unitsBluffport Marl Member
UnderliesRipley Formation
OverliesMooreville Chalk Formation
Lithology
PrimaryChalk
Location
RegionAlabama, Mississippi, Tennessee
CountryUnited States
Type section
Named forDemopolis, 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 age 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.

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