Bishop, M.A.2025-12-172025-12-172004Earth Surface Processes and Landforms, 2004; 29(1):125-1310197-93371096-9837https://hdl.handle.net/1959.8/26808<jats:title>Abstract</jats:title><jats:p>Distribution‐free statistical methods of comparative data analysis have identified subtle granulometric differences attributed to the evolution of barchan form at Gurra‐Gurra waterhole. Geomorphic locations on the barchan dunes display statistically significant grain‐size differences that assist in the interpretation of aeolian processes. In summer, very fine sands mantle the dunescape and are the fraction that most affects the parameters of sorting and skewness. The surficial sedimentological character is one of subtle contrasts between the processes of grain winnowing and intergranular protection. The second and third moment measures are parameters that best demonstrate the spatial granulometric differences. Dune‐forming processes at Gurra‐Gurra have produced dune sands that have a very narrow range of grain size, which, in turn, reflects textural and mineralogical maturity, and hence an extensive transport history. The statistical techniques employed in this study can also be used for the comparison of temporal (seasonal) sedimentological change, and for the granulometric analysis and association of process for dunes of different morpho‐types. Copyright © 2004 John Wiley &amp; Sons, Ltd.</jats:p>enCopyright status unknownbarchan dunesaeolian sedimentologyStrzelecki Desertprocess analysisPhysicsASCED:010301Journal article10.1002/esp.1007