USGS Visual Identifier
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Geologic Unit: Conway

Conway Granite of White Mountain Plutonic-Volcanic Suite (NH*)

Jurassic, Early*
Jurassic, Middle*
Jurassic, Late*
Jurassic, Late(?)*
Geologic Province:
New England province*

Areal Extent:

Type Locality:
Type area: Conway, Carroll Co., eastern NH (Hitchcock, 1874).

Unit Name History:
Named (C.H. Hitchcock, 1874, Geol. New Hampshire, pt. 1, btw. p. 508 and 545) [From US geologic names lexicon, USGS Bull. 896; synopsis not included here].
Age modified; Isotopic dating (Lyons, 1964).
Isotopic dating (Foland and Faul, 1977; Eby and others, 1992).
Revised; Age modified; Isotopic dating (Moench and others, 1995).
NH State Geol. Map usage; Age modified; Isotopic dating (Lyons and others, 1997).

Note: If you need more information, please contact Nancy Stamm (
Asterisks (*) indicate usage by the U.S. Geological Survey. Other usages by state geological surveys.

"No current usage" implies that a name has been abandoned or that it has fallen into disuse. Former usage and, if known, replacement name given in parentheses ().

Slashes (/) indicate unit name usage violates the 1983 North American Stratigraphic Code. This violation may be explained within brackets ([ ]).

U.S. Department of the Interior, U.S. Geological Survey, Reston, VA, USA
Database project personnel
Last modified: 15-Jan-2013