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Comparative Nearest Neighbor Analysis of Mega-Barchanoid Dunes, Ar Rub al Khali, Sand Sea: The Application of Geographical Indices to the Understanding of Dune Field Self-Organization, Maturity and Environmental Change

Wednesday, August 26, 2009
Mark
Bishop (PSI and University of South Australia)

The geographic signature of dune distribution and self-organization as measured by the R-statistic offers a viewpoint on the geography of crescentic eolian systems and proposes an index from which to determine the degree of self-organization (maturity) and possibly age, across a variety of spatial scales and planetary contexts. This analog study examines and compares the geography of crescentic megadune patterns for the Ar Rub' al Khali sand sea of the Arabian Peninsula. The sand sea of megabarchanoid forms has shown the degree of self-organization to be high compared to those dune fields so far examined for Mars; although the overarching association of morphology and pattern is similar for both planetary landscapes.

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