alluvial fan
noun Date: 1873 the alluvial deposit of a stream where it issues from a gorge upon a plain or of a tributary stream at its junction with the main stream

New Collegiate Dictionary. 2001.

Look at other dictionaries:

  • alluvial fan — n. a gradually sloping mass of alluvium that widens out like a fan from the place where a stream begins to slow down …   English World dictionary

  • alluvial fan — Physical Geog. a fan shaped alluvial deposit formed by a stream where its velocity is abruptly decreased, as at the mouth of a ravine or at the foot of a mountain. Also called alluvial cone. [1870 75] * * * ▪ geological feature  unconsolidated… …   Universalium

  • Alluvial fan — An alluvial fan is a fan shaped deposit formed where a fast flowing stream flattens, slows, and spreads typically at the exit of a canyon onto a flatter plain. A convergence of neighboring alluvial fans into a single apron of deposits against a… …   Wikipedia

  • alluvial fan — /əˌluviəl ˈfæn/ (say uh.loohveeuhl fan) noun a fan shaped alluvial deposit formed by a stream where its velocity is abruptly decreased, as at the mouth of a ravine or at the foot of a mountain. Also, alluvial cone …   Australian English dictionary

  • alluvial fan — allu′vial fan′ n. geo gel a fan shaped alluvial deposit formed by a stream where its velocity is abruptly decreased, as at the mouth of a ravine …   From formal English to slang

  • alluvial fan — noun a fan shaped deposit where a fast flowing stream flattens out • Syn: ↑alluvial cone • Hypernyms: ↑geological phenomenon …   Useful english dictionary

  • alluvial fan —   a fan shaped deposit of river load where energy has been lost due to the river exiting abruptly from a narrow upland valley to a lowland plain …   Geography glossary

  • alluvial fan —    A fan like deposit of detrital material from steep mountain slopes [16] …   Lexicon of Cave and Karst Terminology

  • alluvial fan —    A low, outspread mass of loose materials and/or rock material, commonly with gentle slopes, shaped like an open fan or a segment of a cone, deposited by a stream (best expressed in semiarid regions) at the place where it issues from a narrow… …   Glossary of landform and geologic terms

  • alluvial fan — noun A cone shaped heap of alluvium deposited by a river …   Wiktionary

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