USGS Visual Identifier
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Geologic Unit: Calef

Calef Member of Eliot Formation of Merrimack Group (NH*)

Geologic Province:
New England province*

Areal Extent:

Type Locality:
Exposed between villages of Epping [Rockingham Co.] and Lee [Stafford Co.], Mount Pawtuckaway 15-min quadrangle, southeastern NH. Named from Calef Road (Freedman, 1950).

Unit Name History:
[Please note: Sundeen (1971), Bothner (1974), Hussey (1985), and Lyons and others (1986) have yet to be added from the GNC index card files. Until then, feel free to contact us if you would like complete bibliographic citations.]
Named (Freedman, 1950).
Age modified (Billings, 1955; Sundeen, 1971; Bothner, 1974; Goldsmith and others, 1982).
Age modified; Revised (Hussey, 1985).
Age modified (Lyons and others, 1986).
NH State Geol. Map usage; Age modified (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