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National Geologic Map Database

Geologic Unit: Clayton

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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).