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National Geologic Map Database

Geologic Unit: Hannibal

Usage:

Hannibal Shale (IL*,MO*)
Hannibal Member of New Albany Shale (IN)
Hannibal Shale Member of New Albany Shale of Knobs Group (IL)


Subunits:

[?] Nutwood Shale Bed (IL).


Geologic age:

Early Mississippian (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 usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).