| Peedee Formation | |
|---|---|
| Stratigraphic range: | |
_(Pee_Dee_Formation,_Upper_Cretaceous;_Myrtle_Beach,_South_Carolina,_USA)_3.jpg) | |
| 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[1] |
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).[1] 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.[2]
