USGS Visual Identifier
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Geologic Unit: Rangeley

Rangeley Formation (ME*,MA*,NH*,VT*)

Silurian, Early*

Geologic Province:
New England province*

Areal Extent:

Type Locality:
Cascade Stream, 5.6 km north of the town of Rangeley, Rangeley 15-min quadrangle, Franklin Co., ME. (Smith, 1923).

Unit Name History:
Named Rangeley conglomerate in ME (Smith, 1923).
Revised to Rangeley Formation (Osberg and others, 1968).
Extended into NH (Hatch and others, 1983).
Age modified (Moench and Pankiwskyj, 1988).
Revised; Extended into MA (Hatch and others, 1988).
Revised; Areal limits (Moench, 1990).
Overview (Berry, 1992).
Revised; Age modified; Biostratigraphic dating; Extended into VT (Moench and others, 1995).
NH State Geol. Map usage; 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