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alluvial fan

World Encyclopedia | 2005 | Copyright

alluvial fan Fan-shaped area of alluvium (water-borne sediment) deposited by a river when the stream reaches a plain on lower ground, and the water velocity is abruptly reduced. Organic matter is also transported, making the soil highly fertile. Valuable minerals such as cassiterite (tin ore, SnO₂), diamonds, gold, and platinum are often found in alluvial fans.

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alluvial fan

A Dictionary of Ecology | 2004 | | Copyright

alluvial fan(alluvial cone) A mass of sediment deposited at some point along a stream course at which there is a sharp decrease in gradient (e.g. between a mountain range and a plain). Essentially, a fan is the terrestrial equivalent of a river-delta formation.

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MICHAEL ALLABY. "alluvial fan." A Dictionary of Ecology. 2004. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "alluvial fan." A Dictionary of Ecology. 2004. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O14-alluvialfan.html

MICHAEL ALLABY. "alluvial fan." A Dictionary of Ecology. 2004. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-alluvialfan.html

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alluvial fan

A Dictionary of Earth Sciences | 1999 | | Copyright

alluvial fan (alluvial cone) Mass of sediment deposited at some point along a stream course at which there is a sharp decrease in gradient, e.g. between a mountain range and a plain. Essentially, a fan is the terrestrial equivalent of a river-delta formation.

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AILSA ALLABY and MICHAEL ALLABY. "alluvial fan." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "alluvial fan." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O13-alluvialfan.html

AILSA ALLABY and MICHAEL ALLABY. "alluvial fan." A Dictionary of Earth Sciences. 1999. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-alluvialfan.html

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alluvial fan

A Dictionary of Plant Sciences | 1998 | | Copyright

alluvial fan A mass of sediment deposited at some point at which there is a sharp decrease in gradient, e.g. between a mountain range and a plain. Essentially, a fan is the land-bound equivalent of a river-delta formation.

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MICHAEL ALLABY. "alluvial fan." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 1 Jun. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "alluvial fan." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (June 1, 2012). http://www.encyclopedia.com/doc/1O7-alluvialfan.html

MICHAEL ALLABY. "alluvial fan." A Dictionary of Plant Sciences. 1998. Retrieved June 01, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-alluvialfan.html

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Free newspaper and magazine articles

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