Usage:
Cope Hollow Formation of /Taum Sauk Group of /St. Francois Mountains Volcanic Supergroup (MO-recognized locally in St. Francois Mountains area)
[Name Taum Sauk used for both group and formation within it (Taum Sauk Rhyolite has priority); name St. Francois Mountains applied concurrently to two different units in same area; a [supergroup] name combines a geographic name with the term ["supergroup,"] and no lithic designation is included (see ACSN, 1970; NACSN, 1983, 2005, 2021).]
Geologic age:
Mesoproterozoic
Type section, locality, area and/or origin of name:
Type section: exposures north of swimming area of Johnson Shut-ins State Park, in SW/4 NW/4 sec. 16, T. 33 N., R. 2 E., St. Francois Mountains, Johnsons Shut-ins quadrangle, southeast MO. Either named from creek in Reynolds Co., MO or from town of Cope Hollow (Berry, 1976).
AAPG geologic province:
Midcontinent region
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 ([ ]).