No current usage.
(†Ardian Series or †Ardian Epoch considered obsolete.)
Early Pennsylvanian
Type sequence: Ardmore basin south of Arbuckle Mountains, southern OK. Named from first syllable of Ardmore (Moore and Thompson, 1949).
North America
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 conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).