Polygonal Crater

Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-9213-9_275-1

Definition

An impact crater having a polygonal rim shape in plan view.

Synonyms

Description

A polygonal crater is an impact crater which in plan view is not circular, elliptical, or irregular, but more closely resembles a regular polygon with straight rim segments and clearly discernible angles between them. Typically only a part of the rim circumference is formed by straight segments. However, no rigorous definition of a polygonal crater exists.

Morphometry

Any size polygonal craters, up to basins, can be found (Kopal 1966; Öhman 2009, Singer and McKinnon 2011), but the majority are found slightly above (1–5×) the transition diameter from simple to complex craters (Pohn and Offield 1970; Öhman 2009). Most often polygonal craters display a partial hexagonal (six-sided) form, often with two to four distinctly straight rim segments (Fig. 1). Polygonal craters may be roughly square-shaped (e.g., Meteor Crater in Arizona) (Kumar and Kring 2008...

Keywords

Impact Crater Crater Formation Explosion Crater Wrinkle Ridge Shear Stress Direction 
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.Earth and Space Physics, Department of PhysicsUniversity of OuluOuluFinland
  2. 2.Arctic Planetary Science InstituteRovaniemiFinland