Usage:
Elvins Group (MO)
Subunits:
(alphabetical) --all in MO: Davis Formation, Derby-Doerun Dolomite (usage of the MO Geol. Survey, 1979).
Geologic age:
Late Cambrian (Millardan)*
Type section, locality, area and/or origin of name:
Named from exposures at Elvins, St. Francois Co., southeastern MO (Bain and Ulrich, 1905).
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 ([ ]).