GEOLOGY

Detailed explanation-1: -Sand, along with gravel, silt and clay are collectively known as sediment, and are produced by the mechanical and chemical breakdown of rocks.

Detailed explanation-2: -Coarse-grained sediments and sedimentary rocks Gravel is rock particles that have been moved by moving water. Gravel usually consists of a mix of the more durable and most abundant rock types in the sediment source areas (Figure 6.41).

Detailed explanation-3: -The word sediment is a general term for mineral particles, for example individual sand grains, which have been created by the weathering of rocks and soil and transported by natural processes, like water and wind. In decreasing order of size, sediments include boulders, gravel, sand, and silt.

Detailed explanation-4: -The term sediment refers to loose particulate material (clay, sand, gravel, etc.). Sediment becomes a sedimentary rock through a process known as lithification. Lithification begins when rocks are buried and become compacted.