GEOLOGY

Detailed explanation-1: -Sand: between 1/16 and 2 millimeters. Pebble: between 2 and 64 millimeters. Cobble: between 64 and 256 millimeters. Boulder: greater than 256 millimeters.

Detailed explanation-2: -The Wentworth Scale classifies sediment by grain size. Clay sediments are the smallest with a grain diameter of less than . 004 mm and boulders are the largest with grain diameters of 256 mm or larger.

Detailed explanation-3: -Classification of Sediments Sediments are commonly subdivided into three major groups-mechanical, chemical, and organic.

Detailed explanation-4: -Sediment is made up of loose particles of sand, silt, and clay. Particle size refers to the diameter of individual grains of sediment.