USGS Visual Identifier
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Geologic Unit: Bethlehem

Bethlehem Granodiorite of the New Hampshire Plutonic Suite (NH*)
Bethlehem Gneiss of the New Hampshire Plutonic Suite (VT)

Devonian, Early*

Geologic Province:
New England province*

Areal Extent:

Type Locality:
Exposures on Green Mountain, 2 mi southwest of Landaff, Moosilauke 15-min quadrangle, NH. Named from Bethlehem, NH (Billings, 1956).

Unit Name History:
Named Bethlehem gneiss (Hitchcock, 1872).
Overview (Hitchcock, 1877).
Age modified; Areal limits (Hitchcock, 1896).
Revised; Age modified (Hitchcock, 1904; Billings and Williams, 1935).
Revised (Billings, 1937).
NH State Geol. Map usage; Revised; Age modified (Billings, 1955).
Overview; Type locality (Billings, 1956).
Age modified (Cady, 1969).
Age modified; Isotopic dating (Lyons and Livingston, 1977).
Revised (Chamberlain and Lyons, 1983; Clark and Lyons, 1986).
Age modified; Isotopic dating; Areal limits (Moench, 1990).
Areal limits (Thompson, 1990).
Revised; Age modified; Isotopic dating (Moench and others, 1995).
NH State Geol. Map usage (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