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Allurer
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Alluvia
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alluvial cone
alluvial fan
alluvial flat
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alluvial soil
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alluvial deposit definitions

WordNet (r) 3.0 (2005)

n
1: clay or silt or gravel carried by rushing streams and deposited where the stream slows down [syn: alluvial sediment, alluvial deposit, alluvium, alluvion]

Britannica Concise

Material deposited by rivers. It consisting of silt, sand, clay, and gravel, as well as much organic matter. Alluvial deposits are usually most extensive in the lower part of a river's course, forming floodplains and deltas, but they may form at any point where the river overflows its banks or where the flow of a river is checked. They yield very fertile soils, such as those of the deltas of the Mississippi, Nile, Ganges and Brahmaputra, and Huang (Yellow) rivers. They contain most of the world's supply of tin ore, as well as, in some regions, gold, platinum, and gemstones.




 


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