Usage:
St. Clair Limestone (AR*,IL*,MO*,OK*)
St. Clair Limestone of Bainbridge Group (IL,IN,KY)
St. Clair Formation of Bainbridge Group (MO)
St. Clair Limestone Member of Bainbridge Formation (IL*,MO*)
Geologic age:
Silurian*
Niagaran*
Type section, locality, area and/or origin of name:
St. Clair Springs, 8 miles northeast of Batesville, Independence Co., AR (Penrose, 1891).
AAPG geologic province:
Arkoma basin*
Illinois basin*
Ozark uplift*
Upper Mississippi embayment*
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 ([ ]).