Show WHAT IS A PLACER I A placer Is an nn unconsolidated deposit accumulated b by mechanical processes carrying one olle or more minerals In commercial com corn mercial quantities says a government report- report All placers are secondary deposits de tie- de- de posits that posits that is IB Is the material of or which the they are composed was originally original derived de derived do- do rived b by erosion of bedrock Although It Is undoubtedly undoubted true that under certain certain I tain lain conditions nuggets of ot placer pIncer gold pole have havo been boen enlarged through h chemical precipitation yet et this action is a negligible nag neg 1 quantity In placers Placers may maybe maybe maybe be derived solely b by rock weathering without water sorting but more commonly com corn moni are tho the result of ot water transportation transportation tation sorting and deposition Many of ot tho the richest placers are aro those formed b by the erosion of older placers pincers and arid the concentration of ot th their gold |