Peedee Formation

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 from the Late Cretaceous.[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.

Peedee Formation Stratigraphic range: Late Cretaceous
Type	Formation
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]