A marine deposit representing an inner neritic environment,[2] named for exposures along the Great Peedee River, it preserves invertebrate (primarily belemnites, echinoderms and foraminifera) and vertebrate (primarily shark teeth, with some marine reptile remains) 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] Based on its fauna, it appears to be roughly concurrent with the Navesink Formation from New Jersey.

[3] Based on Case et al. (2017):[2] Allison Ferry, South Carolina ?Myrtle Beach, South Carolina Niels Eddy Landing, North Carolina East Coast Limestone Quarry, North Carolina Myrtle Beach, South Carolina The Peedee Formation preserves some of the latest-occurring remains of the Roveacrinida, an extinct order of minute, pelagic crinoids.