Desiccation Crack Polygon

  • Mohamed Ramy El-Maarry
Living reference work entry
DOI: https://doi.org/10.1007/978-1-4614-9213-9_111-1

Definition

Drying-induced fractures in a geologic material aligned in a polygonal pattern.

Synonyms

Description

Polygonal pattern outlined by a network of desiccation cracks or fissures developed in fine-grained soil material (El Maarry et al. 2012). They typically intersect at right angles, exhibiting T-junctions (Weinberger 1999*). Their morphology can be 4, 3, 5, and 6 sided (in the order of decreasing abundance); they can be oriented or arcuate (Picard and High 1973, pp. 105–110). Mud shrinkage cracks often have curled rims (Kargel 2004, p. 271) or mud curls formed by peeling (Style et al. 2011). Their morphology is similar to that of thermal contraction crack polygons.

Morphometry

On Earth, desiccation polygons can span different sizes ranging from centimeters, while usually <2 m across...

Keywords

Impact Crater Shrinkage Crack Desiccation Crack Crater Floor Hydrological Indicator 
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.Physikalisches Institut, Bern UniveristätBerneSwitzerland