Whigville Member [of Taine Mountain Formation]

Gray, medium-grained, generally fairly well layered to well-laminated ("pin-stripe") gneissic or schistose granofels, composed of quartz. oligoclase, biotite, muscovite, and garnet, and locally staurolite and kyanite or sillimanite. The Taine Mountain Formation of Stanley (1964) is here adopted in the Collinsville and Bristol quads., CT. Includes three pinstriped units, the Wildcat, Scranton Mountain, and Whigville Members of Stanley (1964), also adopted. Whigville Member consists of plagioclase-quartz gneiss marked by distinctive thin layering (pinstriping) of muscovite and biotite. Thickness is 3,000 ft. Overlies the Scranton Mountain Member; underlies the Bristol Gneiss (revised). The Taine Mountain correlates with the Savoy Schist of Emerson (1898), Missisquoi Schist or Group of Richardson (1919, 1924), in MA; and the Moretown Formation of Cady (1956) in MA and VT. Age is Middle Ordovician (Simpson, 1990).
State Connecticut
Name Whigville Member [of Taine Mountain Formation]
Geologic age Lower? Ordovician
Lithologic constituents
Major
Metamorphic > Granoblastic > GranofelsGray, medium-grained, generally fairly well layered to well-laminated ("pin-stripe") gneissic or schistose granofels, composed of quartz. oligoclase, biotite, muscovite, and garnet, and locally staurolite and kyanite or sillimanite.
Comments Part of Central Lowlands; Iapetus (Oceanic) Terrane - Connecticut Valley Synclinorium; Gneiss Dome Belt. Equivalents of Savoy Schist of Massachusetts (Emerson, 1898, 1917) (CT009, CT010) and of Moretown Formation of Vermont and Massachusetts (Bedrock Geologic Map of Massachusetts, Zen and others, 1983) (CT011) (includes Taine Mountain Formation) (Lower? Ordovician). Secondary unit description per CT008.
References
NGMDB product
Counties Hartford