Usage:
Clayton Formation of Midway Group (AL*,AR*,GA*,IL*,KY*,LA*,MO*,MS*,TN*)
Clayton Formation (IL)
Clayton Limestone of Midway Group (MS)
Subunits:
(alphabetical): Chalybeate Limestone Member (MS*), McBryde Limestone Member (AL*), Pine Barren Member (AL*).
Geologic age:
early Tertiary (Paleocene; Midwayan Provincial Age)*
Type section, locality, area and/or origin of name:
Type locality: railroad cut on the Central of Georgia RR, about 1 mi east of Clayton, Barbour Co., east-central AL (US geologic names lexicon, USGS Bull. 1200).
Named from exposures near Clayton, Barbour Co., southern AL (US geologic names lexicon, USGS Bull. 896).
AAPG geologic province:
Arkla basin*
Atlantic Coast basin*
Gulf Coast basin*
Illinois basin*
Mid-Gulf Coast basin*
Upper Mississippi embayment*
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 ([ ]).