Material Moved and Deposited by Water Material Moved and Deposited by Water Studying Pedons Alluvium.
Alluvium consists of sediment deposited by running water.
It may occur on terraces well above present streams or in the normally flooded bottom land of existing streams. Remnants of very old stream terraces may be found in dissected country far from any present stream. Along many old established streams lie a whole series of alluvial deposits in terracesyoung deposits in the immediate flood plain, up step by step to the very old deposits on the highest terraces. In some places recent alluvium covers older terraces. These deposits consist of material that has settled out of bodies of still water.