Gravel Driveway Basics. Cost: $1 to $5 per square foot, though installation costs vary widely depending on where you live and the type of base required. Durability: Lifetime, with proper maintenance. Type of gravel: This depends on your area, but angular shapes are preferred over round.
Soil minerals form the basis of soil. They are produced from rocks (parent material) through the processes of weathering and natural erosion. Water, wind, temperature change, gravity, chemical interaction, living organisms and pressure differences all help break down parent material.
soil is naturally occurring, loose material at the surface of the earth, which is capable of supporting plant and animal life. In simple terms, soil is comprised of three components: solid, liquid, and gas. The solid phase accounts for approximately 50% of the volume in a typical soil is a mixture of mineral and organic matter and gives soil its mass.