Alluvium

Material transported and deposited by flowing water, such as clay, silt, sand, and gravel. Soil, the constituents of which have been transported in suspension by flowing water and subsequently deposited by sedimentation. A stratified bed of sand, gravel, silt, and clay deposited by flowing water.

Sediments deposited by erosional processes, usually by streams.

Deposits of clay, silt, sand, gravel, or other particulate materials that have been deposited by a stream or other body of running water in a streambed, on a flood plain, on a delta, or at the base of a mountain.

Sediments deposited by erosional processes, usually by streams.