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National Geologic Map Database

Geologic Unit: Columbiana

Usage:

Columbiana Member of Allegheny Formation (OH*,PA*)


Geologic age:

Middle Pennsylvanian*


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

Located along Brookwood Hollow in sec. 29, Perry Twp., Columbiana Co., OH (Sturgeon and DeLong, 1964).


AAPG geologic province:

Appalachian basin*


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 ([ ]).