TITLE

Alluvium

PUB. DATE
January 2009
SOURCE
World Book Science Dataset;1/1/2009, p1
SOURCE TYPE
Encyclopedia
DOC. TYPE
Reference Entry
ABSTRACT
Alluvium, the silt, clay, sand, and other material transported and deposited by running water. The term excludes lake and ocean deposits and is usually restricted to geologically recent sediments. Alluvium is laid down in many places but occurs most extensively on flood plains (areas along streams that are subjected to flooding); in river deltas; and in alluvial fans, cones, and plains at the base of steep mountains. Some of the world's richest agricultural land consists of alluvial soil. Such regions are also among the most heavily populated on earth. Examples include the Nile River valley and the deltas of eastern and southeastern Asia.
ACCESSION #
37310315

 

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