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National Geologic Map Database

Geologic Unit: Columbiana

Usage:

No current usage.
(Rocks of †Columbiana Formation (AL) reallocated to Athens Shale. See Athens.)


Geologic age:

Late Ordovician (late Whiterockian to Mohawkian; late Chazyan to Turinian)


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

Type section: just west of Simpson Springs, 2.5 mi northwest of Calera, [Montevalo 15-min quadrangle, 1944 ed.], Shelby Co., AL. Named from Columbiana 15-min quadrangle in which east side of Calera is located (Cooper, 1956).


AAPG geologic province:

Appalachian basin


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 ([ ]).