GEOLOGY

Detailed explanation-1: -Alluvium (from Latin alluvius, from alluere ‘to wash against’) is loose clay, silt, sand, or gravel that has been deposited by running water in a stream bed, on a floodplain, in an alluvial fan or beach, or in similar settings. Alluvium is also sometimes called alluvial deposit.

Detailed explanation-2: -S1: Alluvial soil is formed from the sediments deposited by the rivers in the Indo-Gangetic plains.

Detailed explanation-3: -1.1 Alluvial deposits (river beds) The soils deposited in riverbeds are known as alluvial deposits. Some textbooks use the term, “Fluvial deposits” for the same thing. The size of particles deposited in riverbeds depends on the speed of flow. If the river flow is strong, only large cobble-type material can deposit.

Detailed explanation-4: -As a stream flows down a hill, it picks up sand and other particles-alluvium. The rushing water carries alluvium to a flat plain, where the stream leaves its channel to spread out. Alluvium is deposited as the stream fans out, creating the familiar triangle-shaped feature.

Detailed explanation-5: -Answer and Explanation: Alluvial deposits may contain minerals like tin ore, gold, platinum, gemstones. Such deposits of valuable ores are also called placer deposits.