Decomposed granite of silica sand, silt particles, and clay. Different specific granite types have differing propensities to weather, and so differing likelihoods of producing decomposed granite. The parent granite material is a common type of igneous rock that is granular, with its grains large enough to be distinguished with the unaided eye (i.e., it is phaneritic in texture); it is composed of plagioclase feldspar, orthoclase feldspar, quartz, mica, and possibly other minerals. The chemical transformation of feldspar, one of the primary constituents of granite, into the clay mineral kaolin is one of the important weathering processes. The presence of clay allows water
Fall River granite 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. The granite quarry industry in Fall River had been established by 1840, employing 30 people, with the rock being transported to places such as Newport, New Bedford, Providence, Bristol, and New York City. Several granite quarries operated in the area in the late 19th century, the largest of which was the Beattie Granite Quarry, located near what is now North Quarry Street, near