Petersburg, West Virginia. Petersburg is a city in Grant County, West Virginia, USA. The population was 2,467 at the 2010 census. It is the county seat of Grant County. Contents.
The particles that make up soil are categorized into three groups by size: sand, silt, and clay. Sand particles are the largest and clay particles the smallest. Although a soil could be all sand, all clay, or all silt, that's rare. Instead most soils are a combination of the three.
1 Verbal description of coarse grained soil is done on the basis of its gradation (well or poor), particle shape (angular, sub-angular, rounded or sub-rounded) & mineralogical components. 2  Coarse grained soil exhibit a good load bearing capacity.  Coarse grained soil posseâs good drainage qualities.