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alluvial fan
(redirected from Alluvial fans)

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alluvial fan
n.
A fan-shaped accumulation of alluvium deposited at the mouth of a ravine or at the juncture of a tributary stream with the main stream.
alluvial fan, cone
n
(Earth Sciences / Geological Science) a fan-shaped accumulation of silt, sand, gravel, and boulders deposited by fast-flowing mountain rivers when they reach flatter land
alluvial fan  (-lv-l)
A fan-shaped mass of sediment, especially silt, sand, gravel, and boulders, deposited by a river when its flow is suddenly slowed. Alluvial fans typically form where a river pours out from a steep valley through mountains onto a flat plain. Unlike deltas, they are not deposited into a body of standing water.
ThesaurusLegend:  Synonyms Related Words Antonyms
Noun1.alluvial fan - a fan-shaped deposit where a fast flowing stream flattens out
alluvial cone
geological phenomenon - a natural phenomenon involving the structure or composition of the earth
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The gully system shows four intervals where water-borne sediments were carried down the steep slopes of nearby alcoves and deposited in alluvial fans," said Samuel Schon, a Brown graduate student and the paper's lead author.
Gullies on Mars show water ran on Red Planet as early as 1.25 mln yrs ... by Asian News International
06 10:30 "DELTA"-BLUFF MARGIN ALLUVIAL FANS James Starnes Mississippi Office of Geology Lateral migration of the Mississippi River into the river's east valley wall creates an escarpment of Peorian loess, Early Pleistocene Pre-loess terrace deposits (coarse sand and gravels of the ancestral Mississippi River), and underlying Tertiary formations (which commonly form the toe of the escarpment).
Geology and geography by Journal of the Mississippi Academy of Sciences
00 Hardcover Special publications; 251 GB591 Two research groups of the Geological Society of London claim that they chose Sorbas, in southeastern Spain as the cite for 2003 a conference on alluvial fans because it is a tectonically active dry region with a wide range of Quaternary alluvial fans.
Alluvial fans; geomorphology, sedimentology, dynamics by SciTech Book News
 
 
 
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