Usage:
Cooper Group (SC*)
Cooper Formation (GA,SC*)
Cooper Marl (GA*)
Subunits:
GROUP STATUS (alphabetical) --all in SC: Ashley Formation*, Drayton limestone beds (informal), Harleyville Formation*, Parkers Ferry Formation*.
FORMATION STATUS (alphabetical) --all in SC: Ashley Member*, Harleyville Member*, Parkers Ferry Member.
Geologic age:
early Tertiary (Eocene to Oligocene)*
Type section, locality, area and/or origin of name:
Named from exposures along Cooper River, Berkeley Co., southern SC (M. Tuomey, 1848, Agricultural Survey of South Carolina, 1st Rpt.).
Principal reference locality: exposure in quarry of the Giant Portland Cement Company near Holly Hill, Dorchester Co., southern SC (Ward and others, 1979).
AAPG geologic province:
Atlantic Coast basin*
South Georgia sedimentary province*
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).