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National Geologic Map Database

Geologic Unit: Martinsburg

Usage:

Martinsburg Formation (MD,NJ*,NY*,PA*,VA*,WV*)
Martinsburg Shale (MD*,NJ*,PA*,TN*,VA*,WV*)
Martinsburg Shale of Chickamauga Group (TN)


Subunits:

(alphabetical): Bushkill Member (NJ*,NY,PA*), Fairview Member (PA), Fincastle Conglomerate Member (VA), High Point Member (NJ*,NY*), Jonestown Beds (PA) or /Jonestown Volcanics [Member] (PA), Paxton Creek Conglomerate Member (PA), Pen Argyl Member (PA*), Ramseyburg Member (NJ*,NY*,PA*), Shochary Sandstone Member (NJ,PA), Shochary Ridge Member (PA), Stickley Run Member (VA*,WV*), West Fairview Member (PA).


Geologic age:

Late Ordovician (Mohawkian to Cincinnatian; late Turinian to Maysvillian)*


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

Type area: Martinsburg, Berkeley Co., east-central WV (Geiger and Keith, 1891).


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 ([ ]).