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National Geologic Map Database

Geologic Unit: Bainbridge

Usage:

Bainbridge Limestone (IL*,MO*)
Bainbridge Formation (IL*,MO*)
Bainbridge Group (IN)


Subunits:

FORMATION STATUS (alphabetical) --all in MO*: Moccasin Springs Member, St. Clair Limestone Member, Seventy-Six Shale Member.
GROUP STATUS (alphabetical) --all in IN: Bailey Limestone, Moccasin Springs Formation, St. Clair Limestone.


Geologic age:

Silurian (late Llandovery to Pridoli)*


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

Named from Bainbridge, Cape Girardeau Co., eastern MO (US geologic names lexicon, USGS Bull. 896).
Type section: along Bainbridge Creek, near Moccasin Springs, in head of small box canyon, in SE/4 SE/4 NW/4 sec. 24, T. 32 N., R. 14 E., Cape Girardeau Co., eastern MO (Ball, 1939).


AAPG geologic province:

Illinois basin*
Ozark uplift*
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 ([ ]).