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

Geologic Unit: Irish Valley

Usage:

Irish Valley Member of Catskill Formation (PA*)


Geologic age:

Late Devonian*


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

Type section: at mouth of Irish Valley on west side of Shanokin Creek, along Reading Railroad north of Shamokin, Northumberland Co., east-central PA (Arndt and others, 1962).


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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).