mixture of clay, silt, sand, gravel, and other unconsolidated rock materials. Deposited during comparatively recent geologic time, by running or flowing water, as sorted and semisorted sediment, in the bed of a stream or on its flood plain. Known as alluvial deposits and alluvion. Alluvial.
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© 2009 Springer-Verlag Berlin Heidelberg New York
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(2009). alluvium. In: Manutchehr-Danai, M. (eds) Dictionary of Gems and Gemology. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-72816-0_528
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DOI: https://doi.org/10.1007/978-3-540-72816-0_528
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