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National Geologic Map Database

Geologic Unit: Middle Run

Usage:

Middle Run Formation (OH,IN,KY)


Geologic age:

Precambrian, late(?)
Proterozoic(?)
Keweenawan(?)


Type section, locality, area and/or origin of name:

Type section: Basal 1910 ft of OH Division Geological Survey (DGS) well 2627, American Aggregates Corp. quarry, approximately 1 mi northeast of town of Lytle, NE/4 sec. 14, T. 3, R. 5, Wayne Twp., Warren Co., southwestern OH. Named from stream which heads near quarry (Shrake and others, 1990).


AAPG geologic province:

Cincinnati arch


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