Alluvial is a term used to describe sedimentary deposits that are formed by the movement of water. It is typically composed of SILT, MUD, and other materials that have been transported by rivers, streams, or other bodies of water. The crossword solutions for this term are Silty (5 letters), SILT (4 letters), DELTA (5 letters), and MUD (3 letters). SILT is a type of soil that is composed of very fine particles, while MUD is a mixture of water and soil that has a thick consistency. DELTA is a triangular-shaped landform that is created when a river splits into multiple channels before entering a larger body of water. Alluvial deposits are often found in deltas, as well as in other areas where water has moved sediment over time.