Demopolis Chalk
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.
| 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 |
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