The New Student's Reference Work/Alluvium

Allu'vium', the name given to the masses of, earth and brought down by currents of water and spread over plains, forming what is called alluvial land. Thus the, the , the and the  have formed their deltas. It is estimated that the Mississippi every year carries down enough sediment to cover 268 square miles of land with a layer of earth one foot deep. The so-called bottom lands are those formed by alluvial deposits. Along rivers it is sometimes formed into terraces by the rising of floods to different heights.