Usage:
Twiggs Clay (GA*)
Twiggs Clay Member of Barnwell Formation (GA*)
Twiggs Clay Member of Dry Branch Formation (GA)
Geologic age:
Tertiary*
Eocene, late*
Jacksonian*
Type section, locality, area and/or origin of name:
At Pikes Peak Station on the Macon, Dublin, and Savannah RR, Twiggs Co., GA. Named from exposures in Twiggs Co. (Cooke and Shearer, 1917; 1919).
AAPG geologic province:
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 ([ ]).