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National Geologic Map Database

Geologic Unit: Mashipacong

Usage:

Mashipacong Member of Rondout Formation (NJ*,NY*,PA*)


Geologic age:

Early Devonian*


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

Type section: in the abandoned William Nearpass quarry, 1.8 mi southwest of Duttonville, in northwest quarter of Port Jervis South 7.5-min quadrangle [approx. Lat. 41 deg. 20.1 min. N., Long. 74 deg. 42.3 min. W., Sussex Co., NJ (A.G. Harris, written commun., ca. 1995)]. Named for its proximity to Mashipacong Island in the Delaware River, Sussex Co., NJ, 1.7 mi west-northwest of quarry (Epstein and others, 1967).


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 ([ ]).