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National Geologic Map Database

Geologic Unit: Coleville

Usage:

Coleville Member of Coburn Formation (PA)


Geologic age:

Late Ordovician (Mohawkian; Chatfieldian; Kirkfieldian to Shermanian)


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

Type section: about 1,250 ft north of Lat. 40 deg. 55 min. and about 9,750 ft west of Long. 77 deg. 45 min., in Bellefonte quadrangle, PA. Exposure is on north edge of town of Bellefonte in cut along east side of Route 53, which leads to Milesburg (Thompson, 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 ([ ]).