Usage:
Sharpsboro Member of Dutchtown Formation (MO)
Sharpsboro Member of Dutchtown Limestone (IL)
Geologic age:
Middle Ordovician
Type section, locality, area and/or origin of name:
Type section: Geiser quarry on north side of State Highway 75, 1.25 mi east of Dutchtown, in SW/4 NW/4 [SW/4?] NW/4 sec. 20 (projected), T. 30 N., R. 13 E., Cape Girardeau quadrangle, Cape Girardeau Co., MO. Named from Sharpsboro on St. Louis-San Francisco RR, in Cape Girardeau Co., MO, 5.5 mi southeast of type section (Templeton and Willman, 1963).
AAPG geologic province:
Ozark uplift
Illinois basin
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 ([ ]).