One ton of gravel covers 100 square feet at 2 inches thick, 80 square feet at 3 inches thick, 70 square feet at 4 inches thick or 60 square feet at 5 inches thick. These stones can be bought in sizes from 3/8 to 4 inches.
Some common types of gravel include rounded pea gravel for landscaping and concrete, crushed stone for road surfacing, coarse piedmont gravel carried by mountain waterways, semi-polished creek rock recovered from river beds, pay gravel with concentrations of precious metals and fine gravel with diameters of less than 4 millimeters. Weathering and erosion creates gravel deposits.
