Usage:
No current usage.
(†St. Joseph Limestone (MO) abandoned. Is same as Bonneterre Formation and Elvins Group. See Bonneterre and Elvins.)
Geologic age:
Middle to Late Cambrian
Type section, locality, area and/or origin of name:
Named from mines of St. Joseph Lead Company near Fredericktown, [southeast of Mine La Motte, eastern edge of Fredericktown quadrangle, scale 1:48,000], Madison Co., eastern MO (US geologic names lexicons, USGS Bull. 896, 1200).
AAPG geologic province:
Ozark uplift
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 ([ ]).