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From Longman Dictionary of Contemporary English
Related topics: Geography
alluviumal‧lu‧vi‧um /əˈluːviəm/ noun [uncountable] technical  SGsoil left by rivers, lakes, floods etc
Examples from the Corpus
alluviumThe soils are developed on marine or estuarine alluvium found between the normal high-water mark and the limit of highest spring tides.The soils are developed on freshwater alluvium.Using open cut excavation where possible, Nuttall has moved about 26,000 cu m of alluvium and gravel.Usually floodplains are not veneers of alluvium explicable by lateral channel movements, but considerable thicknesses smoothing over more complex relief.
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