USGS Visual Identifier
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Geologic Unit: Barnard

Usage:
Barnard Gneiss (VT*)
Barnard Volcanic Member of Missisquoi Formation (VT*)

Age:
Ordovician*
Silurian*
Geologic Province:
New England province*

Areal Extent:
VT*


Type Locality:
Barnard Twp., Windsor Co., VT (Richardson, 1924).

Unit Name History:
Named (Richardson, 1924).
Age modified; Isotopic dating (Aleinikoff and Karabinos, 1990).
Areal limits (Thompson, 1990).
Isotopic dating (Trzcienski and others, 1992).
Overview; Age modified (Ratcliffe, in press).

Note: If you need more information, please contact Nancy Stamm (nstamm@usgs.gov).
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
URL http://ngmdb.usgs.gov/ngmdb/ngm_catalog.ora.html
Database project personnel
Last modified: 15-Jan-2013