alluvial
IPA: æɫˈuviʌɫ
noun
- (countable) A deposition of sediment over a long period of time by a river; an alluvial layer.
- Alluvial soil; specifically, in Australia, gold-bearing alluvial soil.
adjective
- Pertaining to the soil deposited by a stream.
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Examples of "alluvial" in Sentences
- Sapphires are found in alluvial soil near rocks and embedded in gneiss.
- Underwater abyssal fans can be compared to terrestrial landforms known as alluvial fans.
- The Greeks called the alluvial deposit at the mouth of the Nile, from its shape, the Delta of the Nile.
- Aquifers occurring in Namibia are classified as alluvial, Kalahari, fracture, Karst or artesian aquifers.
- Diamonds occur in alluvial lands mostly open and comparatively level, as in India, the Brazil and the Cape.
- Estimates of "prehistoric" and early historic diamond production suggest that 50 to 100,000 carats per year were found, mostly in alluvial deposits in river gravels.
- Like the latter, the Brazilian fields were alluvial, that is, the materials were deposited by river action after having been carried to some distance from their original sources.
- The whole land is alluvial, that is, formed, gradually, through thousands of years, of the rich mud deposited by the two rivers, as they spread into vast marshy flats towards the end of their course.
- The only other chance for agriculture on the river, except Wonsits Valley, Brown's Park, and a few minor places, is below Black Canyon, in the stretches I have called the alluvial and the canyon-valley divisions.
- In the great laboratory of Nature similar chemical depositions have taken place in the past, and may still be in progress; indeed, there is sound scientific reason to suppose that in certain localities this is even now the case, and that in this way much of our so-called alluvial gold has been formed, that is, by the deposition on metallic bases of the gold held in solution.
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