Usage:
Hawthorn Group (FL*,GA*,SC*)
Misspelled Hawthorne in some reports.
Subunits:
GROUP STATUS (alphabetical): Altamaha Formation (GA), Arcadia Formation (FL*), Chattahoochee Formation (GA), Coosawhatchie Formation (FL*,GA*,SC*), Marks Head Formation (FL,GA), Parachucla Formation (FL*,GA*,SC), Peace River Formation (FL*), Penney Farms Formation (FL*), Statenville Formation (FL,GA), Torreya Formation (FL*,GA).
Geologic age:
Tertiary (Oligocene to Pliocene)*
Type section, locality, area and/or origin of name:
Named from exposures at Hawthorn, Alachua Co., FL (US geologic names lexicons, USGS Bull. 896, 1200).
[Principal reference sections:] (1) abandoned quarry located near the station of Grove Park, about 3 mi west of Hawthorn, in SW/4 NE/4 sec. 31, T. 10 S., R. 22 E., Alachua Co., FL; and (2) in bluffs along the Savannah River from Tiger Leap Bluff, Screven Co., to Old Wood Landing, central Effingham Co., GA (see Huddlestun, 1988; Scott, 1988).
AAPG geologic province:
Atlantic Coast basin*
Florida platform*
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 ([ ]).