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National Geologic Map Database

Geologic Unit: Bachelor

Usage:

Bachelor Formation (AR,MO*)
Bachelor Sandstone (IL)


Geologic age:

Early Mississippian (Kinderhookian)


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

Type locality: in stream bed, in SE/4 NW/4 SW/4 sec. 9, T. 48 N., R. 8 W., Callaway Co., MO. Named from exposures to east, west, and south of Bachelor (Mehl, 1960; see also MO Geol. Survey lexicon, Thompson, 2001).


AAPG geologic province:

Illinois basin
Ozark uplift


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