In many situations dune morphologies can be represented as part of a continuum from one dune type to another. More importantly, most dune classification systems fail to emphasize the genetic linkage between different dune types. al., 1993 Lancaster, 1995 Livingstone and Warren, 1996 Thomas, 1997), the problem of dune classification is complicated by the diverse terminology used in the literature and a lack of consensus among geomorphologists. Hack, 1941 McKee, 1979 Pye and Tsoar, 1990 Cooke et. Although several notable attempts have been made to classify dune forms (e.g. Tchakerian, Department of Geography and Geology & Geophysics, Texas A&M University, College Station, Texas Aeolian sand dunes occur in a wide variety of forms in many different environmental settings. Mulligan, Department of Economics and Geography, Texas Tech University Lubbock, Texas Vatche P. DOWNWIND FLAT WINDWARD CLIFF MESA TOP LEEWARD CLIFF FLAT sand sheet echo dunes cliff top dunes leeward dune sand sheet Toward a Genetic Classification of Aeolian Sand Dunes Kevin R. DOWNWIND FLAT SLOPED STEEPLY SLOPED STEEPLY SLOPED SLOPED FLAT sand ramp climbing dune leeward dune sand sheet sand sheet falling dune CLIFFED TERRAIN UPWIND …………………………………………………………………………………………………………….……. BIMODAL WIND UNIMODAL WIND LOW coppice dunes(nebkhas) coppice dunes(nebkhas) stabilized dunes deflation hollows LOW MEDIUM foredunes or lunettes vegetated linear dunes stabilized dunes blowouts MEDIUM HIGH precipitation ridges vegetated linear dunes stabilized dunes parabolic dunes HIGH DUNE FORMS RELATED TO TOPOGRAPHY MOUNTAINOUS TERRAIN UPWIND ………………………………………………………… ……….………………………………………………. STABILIZED SAND …….……… SAND DEFLATION TOTAL SAND DEFLATION UNIMODAL WIND …. DUNE FORMS RELATED TO VEGETATION TOTAL SAND ACCUMULATION SAND ACCUMULATION …………….…….
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