alluvium

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Related to alluvia: alluvial
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Synonyms for alluvium

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

References in periodicals archive ?
As soon as miners hit a gold vein, unscrupulous entrepreneurs, some-times financed by illegal paramilit-ary groups, show up with excavators to churn the soil and divert rivers before using toxic mercury to separate the gold from the alluvia.
The property is favourably situated in the uplands shedding alluvial material to rivers immediately north of the property boundary, which are the sites of alluvia gold workings.
Last year's drilling in this area defined a broad, relatively thick zone of sub-ore grade gold mineralization that may be proximate to higher grade, steeply dipping gold bearing structures masked by alluvia.