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National Geologic Map Database

Geologic Unit: Bigby

Usage:

Bigby Limestone of Nashville Group (TN*)
Also called /Bigby-Cannon Limestone of Nashville Group (TN).

[The use of a hyphen between undifferentiated formations is not considered proper notation (CSN, 1933).]


Geologic age:

Middle Ordovician (Kirkfieldian and Shermanian)*


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

Named from exposures on Big Bigby Creek, Maury Co., west-central TN (US geologic names lexicons, USGS Bull. 896, 1200).


AAPG geologic province:

Cincinnati arch*


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 ([ ]).