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.
What do all types of soil have in common? All types of soil are composed of three basic ingredients: silt,clay, and sand. Additionally, many soils have a layer of humuswhich is organic material. Different proportions â¦ of each are whatmake different soils have the characteristics that they have.