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Westchester marble
Westchester marble — or Inwood marble or Kingsbridge marble — originating in Westchester County, New York, USA, and surrounding counties, has long been quarried at Tuckahoe ("Tuckahoe marble"), Sing Sing, Hastings, and Thornwood.〔The greater Inwood marble formation stretches from northern Manhattan, the Bronx (Kingsbridge, Mott Haven, Melrose, Tremont ), and Westchester County into western Connecticut.〕 It is part of the Inwood Formation dating from the Late Cambrian to Early the Ordovician.〔(Tuckahoe Marble )〕
==Description and geology==
Westchester marble is characterized scientifically as a dolomitic marble and varies in color from a light gray to light green to a bluish white or the brilliant white often found in the Tuckahoe quarries. A distinctive characteristic is the medium-to-coarse size of the calcite and dolomite particles that primarily compose the stone, which often contains minor amounts of hematite and pyrite. Oxidation of these iron-bearing minerals causes Westchester marble to turn orange-brown when the stone is exposed to weather.〔 〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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