What is gravel made of? Typically, most gravel varieties are composed of a mix of unconsolidated rock fragments; which essentially means, a loosely composed pile of small rocks. In fact,
gravel is often referred to as "crushed rocks." Because that's how it's made. Some gravel is formed naturally as seen near lakes but most is developed through a process of mixing crushed rock mediums into one gravel composition.
The rock varieties commonly used for this process include sandstone, limestone, basalt, and others.
What are the different types of gravel? There are many different types of gravel to choose from. At Folsom's alone, we carry seven types including C-ballast, SB2, red clay gravel, river rock gravel, masonry sand, oversized gravel, and pea gravel. These refer to more specific gravel types but the general classifications of gravel falls under limestone, creek gravel, cobble, and pea gravel varieties.
Limestone gravel types are ideal for driveways and walkways since they make a solid base easily. Creek gravel (as its name implies) is composed of smooth, pebble-like rocks that can be used for driveways as well. While similar in texture, cobble gravel works well for paths but not driveways since it's more loosely composed. Pea gravel is a very commonly seen gravel type that's utilized for a variety of purposes.