Usage:
Hannibal Shale (IL*,MO*)
Hannibal Shale Member of New Albany Shale of Knobs Group (IL-southern part)
Hannibal Shale Member of New Albany Shale (KY, and IL-northern part)
Hannibal Member of New Albany Shale (IN,KY)
Subunits:
[?] Nutwood Shale Bed (IL).
Geologic age:
Early Mississippian (Kinderhookian)*
Locally, possibly Late Devonian to Early Mississippian (Famennian to Kinderhookian).
Type section, locality, area and/or origin of name:
Type section: exposures in east bluff along the Mississippi River, immediately south of town of Hannibal, in NW/4 SE/4 sec. 28, T. 57 N., R. 4 W., Hannibal East 7.5-min quadrangle, Marion Co., northeastern MO. Named from Hannibal, Marion Co., northeastern MO (Keyes, 1892; see also MO Geol. Survey lexicon, Thompson, 2001).
AAPG geologic province:
Illinois basin*
Lincoln anticline*
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 ([ ]).