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
Granite, Virginia Granite, Virginia Granite was an unincorporated community in Chesterfield County, Virginia. It was originally located along the Richmond and Danville Railroad five miles west of Manchester and about a mile south of the rapids of the James River along Powhite Creek. According to documents on file at the Library of Virginia, in April 1872, notice was published in Petersburg that Mathew Hall had been appointed postmaster of a new U.S. Post Office at Granite. Granite was named for the granite rock formations which underlie the rapids of the river at the geological fall line which begin downstream from the current