Peedee Formation
| Peedee Formation | |
|---|---|
| Stratigraphic range: | |
| |
| Type | Formation |
| Underlies | Castle Hayne Limestone |
| Overlies | Black Creek Formation |
| Thickness | Up to 886 ft (270 m) |
| Lithology | |
| Primary | Glauconitic to argillic sandstone |
| Other | Claystone, limestone |
| Location | |
| Region | North & South Carolina |
| Country | United States |
| Type section | |
| Named for | Pee Dee River, type locality: Burches Ferry, South Carolina |
The Peedee Formation is a geologic formation in North and South Carolina. A marine deposit, named for exposures along the Great Peedee River, it preserves belemnites and foraminifera fossils dating to the Late Cretaceous (Maastrichtian). The formation is notable for its occurrence of Belemnitella americana, known as the Pee Dee Belemnite (PDB), a long-standing standard in stable carbon isotope research. A single pterosaur femur, possibly an Azhdarchid, from the Peedee formation is one of the few pterosaur body fossils found in Eastern North America.