Streamlined Island

Living reference work entry


Teardrop-shaped mesoscale landscape features in plan view, having a tapered downstream tail.



Streamlined forms are often semi-lemniscate in plan view and may be composed of layers (Burr 2005) and so can have terrace-like benches along their margins. Some islands may be rhomboid or diamond-like shaped.


None but see also yardangs in aeolian systems


Commonly semi-lemniscate in plan view, with a length to width ratio averaging 3–4 (Komar 1983) and maximum width (y) ideally at a distance along the length (x) of 0.6–0.7× (Wyrick 2005). Shape is generally ascribed to one of the mathematical forms detailed by Zhukovsky (Anderson 1997).


Generally interpreted to represent a shape that is hydraulically streamlined by deposition and erosion of sediment and rock by fluid flow to minimize flow resistance.


Models on the origin of the islands:
  1. (1)
    Depositional: the channel-forming flows were ponded by local...


Plan View Cohesive Sediment Catastrophic Flood Outflow Channel Flood Sediment 
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Copyright information

© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Institut für PlanetologieWestfälische Wilhelms-UniversitätMünsterGermany
  2. 2.Geography & EnvironmentUniversity of SouthamptonSouthamptonUK