Williamsburg Formation

Williamsburg Formation
Stratigraphic range: Thanetian (Clarkforkian) ~58–55 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Formation
Unit of	Black Mingo Group
Overlies	Rhems Formation
Lithology
Primary	Sandstone
Other	Phosphorite
Location
Coordinates	33°42′N 79°48′W / 33.7°N 79.8°W / 33.7; -79.8
Approximate paleocoordinates	34°48′N 62°36′W / 34.8°N 62.6°W / 34.8; -62.6
Region	South Carolina
Country	United States
Type section
Named for	Williamsburg County, South Carolina

The Williamsburg Formation is a geologic formation in South Carolina consisting of sandy shale and clayey sand.^[1] It is a member of the Black Mingo Group and overlays the Rhems Formation. It preserves fossils, among others coprolites, dating back to the Paleogene period.

The following fossils were reported from the formation:^[1]

• Ectoganus gliriformis
• E. lobdelli
• Mingotherium holtae

• Agomphus pectoralis
• A. aff. alabamensis
• Osteopygis emarginatus
• Trionyx virginiana
• Adocus sp.
• ?Bothremys sp.
• Chelonioidea indet.
• Cheloniidae indet.
• Pelomedusoides indet.
• Taphrosphyini indet.
• Toxochelyinae indet.

Crocodylians

• Bottosaurus sp.
• Hyposaurus sp.
• Thoracosaurus sp.
• Eusuchia indet.

Snakes

• Palaeophis sp.

• List of fossiliferous stratigraphic units in South Carolina
• Paleontology in South Carolina

• Sawyer, G. T (1998), "Coprolites of the Black Mingo Group (Paleocene) of the South Carolina", Transactions of the American Philosophical Society, 88 (4): 221–228, doi:10.2307/1006676, JSTOR 1006676
• Schoch, R. M (1998), "Late Paleocene land-mammals from the Williamsburg Formation (Black Mingo Group) of South Carolina", Transactions of the American Philosophical Society, 88 (4): 229–245, doi:10.2307/1006677, JSTOR 1006677
• Schoch, R. M (1985), "Preliminary description of a new late Paleocene land-mammal fauna from South Carolina, U.S.A.", Postilla, 196: 1–13
• Van Nieuwenhuise, Don; Colquhoun, Donald (1982), "The Paleocene-lower Eocene Black Mingo Group of the east-central coastal plain of South Carolina", South Carolina Geology, 26 (2): 47–67, retrieved 2018-06-26