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
Rock of Ages Corporation natural stone producer, announced the acquisition of Swenson Granite and Rock of Ages Corporation to become the largest producer of marble and granite in North America. This also includes the Canadian division of Rock of Ages Corporation, located in Stanstead, Quebec, along the Vermont and Quebec border. ROAC maintains the world's largest "deep hole" granite quarry. The quarry is called the "E. L. Smith Quarry", and the Devonian Barre Granite is mined there. Granite was originally quarried using primitive techniques which implemented hand saws and explosive charges to blast away the "benches" of the quarry. Modern techniques have evolved to