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National Geologic Map Database

NGMDB

Geologic Unit: Midway

Usage:

Midway Group (AL*,AR*,FL*,GA*,IL*,KY*,LA*,MO*,MS*,TN*,TX*)


Subunits:

(alphabetical): Clayton Formation (AL*,AR*,GA*,IL*,KY*,LA*,MO*, MS*,TN*) or Clayton Limestone (MS), Kincaid Formation (AR*, LA*,TX*), Logansport Formation (TX), Naheola Formation (AL*,MS*), Porters Creek Clay (AL*,AR*,IL*,KY*,LA*,MO*,MS*,TN*,GA*) or Porters Creek Formation (AL*,GA*,MS), Wills Point Formation (AR*,TX*).


Geologic age:

Tertiary*
Paleocene*


Type section, locality, area and/or origin of name:

Exposures at Midway Landing and plantation on west side of Alabama River, about 5 mi below Prairie Bluff, in Wilcox Co., AL (Harris, 1894).


AAPG geologic province:

East Texas basin*
Arkla basin*
Ouachita folded belt*
Gulf Coast basin*
Black Warrior basin*
Mid-Gulf Coast basin*
Upper Mississippi embayment*


NGMDB

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 ([ ]).

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Page Last Modified: Tue Jun 3 16:19:32 2014