Show question what is a placer A placer Is an unconsolidated deposit accumulated by mechanical pro besses carrying one or more minerals in commercial quantities all placers are secondary deposits that is the material of which they are composed was originally derived by erosion of bedrock although it is undoubtedly true that under cert certain alu conditions nuggets ot of placer gold have been enlarged through chemical precipitation yet this action Is a negligible quantity in placers placers may he be derived solely by rock weathering without water sorting but more commonly are the result of water transportation sorting and deposition many ot of the richest placers are those formed by the erosion of older placers and the of their gold gol d Exclia exchange |