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National Geologic Map Database

Geologic Unit: Brallier

Usage:

Brallier Shale (MD*,VA*,WV*)
Brallier Shale of Susquehanna Group (PA*)
Brallier Formation (VA,WV*)
Brallier Formation of Susquehanna Group (PA*)
Brallier Member of Chattanooga Shale (TN)
Brallier Member of Fort Littleton Formation of Susquehanna Group (PA)


Subunits:

Back Creek Siltstone Member (VA,WV), Minnehaha Springs Member (VA)


Geologic age:

Late Devonian*


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

Named from railway station 6 mi northeast of Everett, Bedford Co., south-central PA (Butts, 1918).


AAPG geologic province:

Appalachian 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 ([ ]).