Usage:
Altamaha Formation of Hawthorn Group (GA)
Altamaha Formation (SC)
Subunits:
Screven Member (GA).
Geologic age:
late Tertiary (Miocene)
Type section, locality, area and/or origin of name:
Named from exposures in bluffs of Altamaha River, especially btw. Rocky Hammock [now in Jeff Davis Co.] to Doctortown, Wayne Co., GA (US geologic names lexicons, USGS Bull. 896, 1200).
Principal reference section: exposures at Upper Sister Bluff, south bank of Altamaha River, Appling Co., GA (Huddlestun, 1988).
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 ([ ]).