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Map showing publication footprint
  • Usage in publication:
    • Branford granite gneiss*
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Granite
  • AAPG geologic province:
    • New England province
Publication:

Gregory, H.E., 1906, The crystalline rocks, Chapter II, IN Rice, W.N., and Gregory, H.E., Manual of the geology of Connecticut: Connecticut Geological and Natural History Survey Bulletin, no. 6, p. 39-155.


Summary:

Pg. 114, 146, and map. Branford granite gneiss. Medium-grained granite, with banded structure, consisting very largely of white feldspar. In the feldspars are embedded small round quartz grains having a slightly brownish tint, and biotite is present in about equal amount. Small reddish garnets commonly present. Covers large part of Branford Townhip, central southern Connecticut. Probably igneous and pre-Cambrian.

Source: US geologic names lexicon (USGS Bull. 896, p. 253).


Map showing publication footprint
  • Usage in publication:
    • Branford gneiss
  • Modifications:
    • Overview
  • AAPG geologic province:
    • New England province
Publication:

Gregory, H.E., and Robinson, H.H., 1907, Preliminary geological map of Connecticut: Connecticut Geological and Natural History Survey Bulletin, no. 7, 39 p., (incl. geologic map, scale 1:250,000)


Summary:

Pg. 38. Branford gneiss is of igneous origin.

Source: US geologic names lexicon (USGS Bull. 896, p. 253).


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 ([ ]).

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