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National Geologic Map Database

Geologic Unit: Run Gap

Usage:

Run Gap Member of Juniata Formation (PA)


Geologic age:

Ordovician, Late
Cincinnatian
Ashgillian


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

Exposures in Run Gap in Tuscarora Mountain, along boundary of Juniata and Perry Cos., central PA. Extends from area of Jacks Mountain, north of Lewistown in Mifflin Co., to area of Shade Mountain at Lost Creek Gap (Swartz, 1957).


AAPG geologic province:

Appalachian basin


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 ([ ]).