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National Geologic Map Database

Geologic Unit: Williamsport

Usage:

Williamsport Formation (WV*)
Williamsport Member of Wills Creek Formation (PA)
/Williamsport Sandstone of [†]Cayuga Group (WV*,PA*,VA*,MD*)

[†Cayuga, at its type locality, has been abandoned as a lithostratigraphic term, and has been used as a chronostratigraphic term (Cayugan Stage) for some time. To prevent confusion, the use of Cayuga as a lithostratigraphic term should be avoided.]


Subunits:

Cedar Cliff Limestone Member (MD*,PA*,WV*,VA*)


Geologic age:

Late Silurian*


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

Exposure on a short branch of Patterson Creek, 0.6 mi east of Williamsport, Grant Co., east-central WV, where private road turns northeast from main Williamsport-Moorefield Highway (Reger, 1924).


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 ([ ]).