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alluvium |
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alluvium a fine-grained fertile soil consisting of mud, silt, and sand deposited by flowing water on flood plains, in river beds, and in estuaries alluvium [ə′lüv·ē·əm] (geology) The detrital materials that are eroded, transported, and deposited by streams; an important constituent of shelf deposits. Also known as alluvial deposit; alluvion. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | |
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From radiocarbon dates of a
few alluvial deposits (sediments deposited by streams or rivers) and
analyses of soils along the southeastern end of the fault, Madole
brackets the time of last movement between 500 and 2,000 years ago. Pan samples of alluvial deposits at Dime Creek revealed
high-grade placer gold and platinum concentrations, as well, as uranium
at the head of Quartz Creek. The alluvial deposits on Dime Creek are composed of mostly volcanic
andesite and basalt sand and gravel with occasional cobbles of intrusive
olivine dunite. |
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