| Waccamaw Formation | |
| Type: | Formation |
| Namedfor: | Waccamaw River |
| Namedby: | William Healey Dall |
| Subunits: | upper, lower |
The Waccamaw Formation is a geologic formation in southeastern North Carolina and eastern South Carolina. It preserves fossils from the early Pleistocene epoch. The Waccamaw Formation contains two informal members: "upper" and "lower". The upper Waccamaw is ~2.0-1.8 million years old. The lower Waccamaw Formation is ~2.4-2.2 million years old.
The stratigraphic section preserves four transgressive pulses in the lower Waccamaw, and four in the Upper. The maximum sea level preserved is about 65 meters above the current level.
The molluscan fauna is quite diverse, nearly a thousand species have been reported.