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 - The product of weathering. Soil is made from rocks, minerals (mainly sand and clay), and organic material (regolith and organic matter) III Erosion. Erosion- the process of moving sediment from one location to another. The most important FORCE of erosion is GRAVITY. The most important AGENT of erosion is WATER.