Streamlined Island

Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-9213-9_547-1

Definition

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

Synonyms

Description

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.

Subtypes

None but see also yardangs in aeolian systems

Morphometry

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).

Interpretation

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.

Formation

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

Keywords

Plan View Cohesive Sediment Catastrophic Flood Outflow Channel Flood Sediment 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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References

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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