- Usage in publication:
-
- Gonic formation*
- Modifications:
-
- Named
- Dominant lithology:
-
- Graywacke
- Phyllite
- Schist
- AAPG geologic province:
-
- New England province
Summary:
Named for exposures near Gonic, Strafford Co., southeastern NH. Consists of whitish or light-gray to dark-gray, thin-bedded, fine-grained arenaceous (graywacke) and argillaceous materials metamorphosed to schist and phyllite. Includes mica schist and phyllite and interbedded fine- to medium-grained micaceous graywacke schists in beds up to 2 ft thick; light- and dark-gray, fine-grained phyllites abundantly studded with dark staurolite crystals; and minor coarse muscovite schist composed almost wholly of mica and very thin quartz laminae. Argillaceous materials predominate, but graywacke is also prominent. Thickness is unknown. Probably underlies Rindgemere formation. Age is Pennsylvanian(?).
Source: GNU records (USGS DDS-6; Reston GNULEX).
- Usage in publication:
-
- Gonic Formation*
- Modifications:
-
- Overview
- Age modified
- AAPG geologic province:
-
- New England province
Summary:
Description of Gove Member of Berwick Formation of Merrimack Group in NH mentions that Gove is equivalent to Gonic Formation of Hussey (1985) in ME. [Implies at least a partial revision in age for the Gonic Formation.] Not used in NH.
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
Asterisk (*) indicates published by U.S. Geological Survey authors.
"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).
Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).