By Nick Lancaster
The booklet is easily written and good prepared, really thorough in its insurance, and freed from critical blunders. Figures and pictures are normally of top of the range. a big source for geomorphologists, sedimentologists, and different scientists attracted to eolian approaches and deposits..
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Additional info for Geomorphology of Desert Dunes
1987; Havholm and Kocurek 1988). 6a) occur in two main areas: (1) on the margins of sand seas and (2) in sand transport corridors linking sand source zones with depositional areas. Despite the attention that has been given to this dune form, they comprise a very small proportion of global sand deposits (Fryberger and Goudie 1981). Small barchans occur on the northern margins of the Namib Sand Sea (Slattery 1990) and on the downwind margins of the Algodones and Skeleton Coast dune fields (Smith 1980; Sweet et al.
1983). longitudinal to the primary wind direction. g. Mainguet 1983, 1984a) have attempted to order dunes by including aspects of their mobility and relation to sediment budgets and thus to distinguish between erosional types (parabolic dunes, sand ridges) and purely depositional forms (barchanoid dunes, transverse chains, linear dunes and star dunes). One problem however with all morphodynamic systems of dune classifications is that they assume a knowledge of how dunes form. As will be seen below (Chapters 5 and 6), that knowledge is at best incomplete.
10) where K is an empirical coefficient which is a function of the textural characteristics of the sediment (K=2. 25 mm). 75. 13 Comparison between different flux equations for sand-sized sediment (after Lancaster and Nickling 1994). This expression provides good estimates of actual sediment flux as demonstrated by both wind tunnel and field experiments (Greeley and Iversen, 1985; Greeley et al. in press). 13) shows that despite the rather similar form of the equations and similar mean particle diameters used in the calculations, the equations give significantly different results.
Geomorphology of Desert Dunes by Nick Lancaster