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Fall River granite
Fall River granite is a Precambrian bedrock underlying the City of Fall River, Massachusetts and surrounding areas along the eastern shores of Narragansett Bay. It was formed 600 million years ago, as part of the Avalon terrane.〔Roadside Geology of Massachusetts, James W. Skehan, 2001〕
During the 19th century, the City of Fall River, Massachusetts became famous for the granite rock on which much of the city is built. The ridge extends approximately from the village of Assonet in the north through Fall River and into Tiverton, Rhode Island in the south, along the edge of the basin that forms Narragansett Bay. The eastern edge of the underlying granite is the Hixville Fault near Dartmouth, Massachusetts.
==Description==
From a distance, the rock exhibits a distinctive tan-gray color. Viewed up close, it is more pink. The granite is very hard and durable, but cannot be polished very well.〔(Herald News article, 1978 )〕 As a result, its appearance on a building is almost always somewhat rough, rather than the sharp lines of other types of building stone.
Edmund Hitchcock, of the 1841 Geological Survey of Massachusetts gave the following description of the granite:
But no rock can be finer for architectural purposes than the granite of Troy...The feldspar of this rock is a mixture of the flesh red and light green varieties; the former predominating: the quartz is light gray, and the mica, usually black... it works easily and has a lighter and more lively appearance than Quincy granite.〔 ((1841 Google Books ))〕
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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