U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database

Geologic Unit: Clearville

Usage:

Clearville Member of Mahantango Formation (PA)
Clearville Sandstone Member of Mahantango Formation (PA)
Clearville Siltstone Member of Mahantango Formation (MD,PA,WV)


Geologic age:

late Middle Devonian (Givetian)*


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

Morris No. 1 well, Clearville quadrangle, Bedford Co., south-central PA (Cate, 1963).


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 ([ ]).