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Felsic gneiss member [of Quinebaug Formation]

Felsic gneiss member [of Quinebaug Formation] - Light- to medium-gray, fine- to medium-grained gneiss, composed of plagioclase, quartz, biotite, and muscovite, commonly with K-feldspar.
StateConnecticut
NameFelsic gneiss member [of Quinebaug Formation]
Geologic ageMiddle Ordovician or older
Original map labelOqf
CommentsPart of Eastern Uplands; Iapetus (Oceanic) Terrane - Merrimack Synclinorium
Primary rock typefelsic gneiss
Secondary rock type
Other rock types
Lithologic constituents
Major
Metamorphic > GneissLight- to medium-gray, fine- to medium-grained gneiss, composed of plagioclase, quartz, biotite, and muscovite, commonly with K-feldspar.
Map references
Connecticut Geological and Natural History Survey, DEP, in cooperation with the U.S. Geological Survey, 2000, Bedrock Geology of Connecticut, data format: shapefile, file name: bedrock, downloaded from: http://magic.lib.uconn.edu/cgi-bin/MAGIC_DBsearch2.pl?Geography=37800&Loc=0000 on 9/18/2003, scale 1:50,000.
Unit references
Rodgers, John, compiler, 1985, Bedrock Geological Map of Connecticut: Connecticut Geological and Natural History Survey, Hartford, Connecticut, 2 sheets, scale 125,000.
Geographic coverageNew London - Windham

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