noun. Sediment deposited by flowing water, as in a riverbed, flood plain, or delta.

noun. A deposit, usually of mingled sand and mud, resulting from the action of fluviatile currents: applied by geologists to the most recent sedimentary deposits, especially such as occur in the valleys of large rivers: opposed to diluvium (which see).

noun. Deposits of earth, sand, gravel, and other transported matter, made by rivers, floods, or other causes, upon land not permanently submerged beneath the waters of lakes or seas.

noun. soil, clay, silt or gravel deposited by flowing water, as it slows, in a river bed, delta, estuary or flood plain

noun. clay or silt or gravel carried by rushing streams and deposited where the stream slows down

"Thus, it does not show the extensive glacial deposits of the North Central and Northeastern States, the deep residuum of the Southeastern and South Central States, the relatively thin alluvium along many major rivers and basins, and extensive eolian deposits on the high plains."

affusion  alluvion  appanage  clays  diluvium  

acres  alluvion  arable land  ash  cataclysm  

alluvia