The idea for this volume came during the dryland sessions of the Association of American Geographers meeting in San Diego in April, 1992. The large number of papers devoted to aeolian processes and landforms indicated to me that aeolian geomorphology had come of age and the last 15 years or so had produced a plethora of papers, books, and edited volumes on all aspects of aeolian geomorphology. Chapter one is my tentative attempt to place develop ments in aeolian geomorphology in a historical perspective and to contemplate some thoughts about the future. The fourteen papers selected address a…mehr
The idea for this volume came during the dryland sessions of the Association of American Geographers meeting in San Diego in April, 1992. The large number of papers devoted to aeolian processes and landforms indicated to me that aeolian geomorphology had come of age and the last 15 years or so had produced a plethora of papers, books, and edited volumes on all aspects of aeolian geomorphology. Chapter one is my tentative attempt to place develop ments in aeolian geomorphology in a historical perspective and to contemplate some thoughts about the future. The fourteen papers selected address a wide range of issues ranging from micro-scale studies devoted to aeolian dust, sediment transport, and rock varnish in ventifacts to medium-scale studies of dunes and dune forms, reverse desertification, and macro-scale studies of ergs and sand transport pathways. The American Southwest, particularly the spectacular and unique Mojave Desert of California, is featured prominently in seven chapters. I hope this volume provides students and colleagues some new perspectives in aeolian geomorphology as well as pathways for future work.Hinweis: Dieser Artikel kann nur an eine deutsche Lieferadresse ausgeliefert werden.
1 The Resurgence of Aeolian Geomorphology.- Historical framework.- Future trends.- Acknowledgments.- References.- 2 Origin of the Gran Desierto Sand Sea: Sonora, Mexico: Evidence from Dune Morphology and Sedimentology.- Regional setting.- Patterns of dune morphology.- Patterns of dune and sand sheet sediments.- Controls of dune morphology.- Discussion.- Conclusions.- Acknowledgments.- References.- 3 Geomorphic and Geochemical Evidence for the Source of Sand in the Algodones Dunes, Colorado Desert, Southeastern California.- Regional geologic setting and previous studies of the origin of the Algodones dunes.- Regional climatic setting.- Geomorphology of the Algodones dunes and East Mesa Aeolian deposits.- Mineralogy and trace element geochemistry.- Summary and conclusions.- Acknowledgments.- References.- 4 Potential Transport of Windblown Sand: Influence of Surface Roughness and Assessment with Radar Data.- Effect of roughness on aeolian processes.- Field data.- Analysis and discussion.- Conclusions.- Acknowledgments.- Appendix 1: Field site description.- Appendix 2: Reduction of wind data.- References.- 5 Sand Transport Paths in the Mojave Desert, Southwestern United States.- Background.- Sand transport paths.- Discussion.- Future work.- Concluding remarks.- Acknowledgments.- References.- 6 Field Methods in a Study of the Process-Response Systems Controlling Dune Morphology, Salton Sea, California.- Study area.- Field methods and instrumentation.- Discussion.- Summary.- Acknowledgments.- References.- 7 Barchan Dunes of the Salton Sea Region, California.- Physical setting.- Dune forms.- Dune motion.- The evolution of the Salton dunefield.- Summary.- Acknowledgments.- References.- 8 Aeolian Modifications of Glacial Moraines at Bishop Creek, Eastern California.- Physical setting.- Methods.- Results and discussion.- Geomorphic implications.- Conclusions.- Acknowledgments.- References.- 9 Alterations of Ventifact Surfaces at the Glacier/Desert Interface.- Surficial alteration of ventifacts.- Results and discussion.- Conclusions.- Acknowledgments.- References.- 10 Fine Material in Rock Fractures: Aeolian Dust or Weathering?.- Methods.- Results.- Discussion.- Acknowledgments.- References.- 11 Modeling Seasonal Patterns of Blowing Dust on the Southern High Plains.- Model objectives.- Model synopsis.- Long-term application.- Results and discussion.- Conclusion.- Acknowledgments.- References.- 12 Reversed Desertification on Sand Dunes Along the Sinai/Negev Border.- Study site and methods.- Analysis and results.- Discussion and conclusions.- Acknowledgments.- References.- 13 A Review of the Effects of Surface Moisture Content on Aeolian Sand Transport.- Empirical models: threshold effects.- Empirical models: transport rates.- Theoretical models: threshold effects.- Theoretical models: transport.- Comparison of threshold models.- Implications for transport rate prediction.- Concluding remarks.- Acknowledgments.- References.- 14 Wind Abrasion and Ventifact Formation in California.- Ventifacts: general observations.- Formation of ventifacts.- Ventifacts in California.- Conclusions.- Acknowledgments.- References.
1 The Resurgence of Aeolian Geomorphology.- Historical framework.- Future trends.- Acknowledgments.- References.- 2 Origin of the Gran Desierto Sand Sea: Sonora, Mexico: Evidence from Dune Morphology and Sedimentology.- Regional setting.- Patterns of dune morphology.- Patterns of dune and sand sheet sediments.- Controls of dune morphology.- Discussion.- Conclusions.- Acknowledgments.- References.- 3 Geomorphic and Geochemical Evidence for the Source of Sand in the Algodones Dunes, Colorado Desert, Southeastern California.- Regional geologic setting and previous studies of the origin of the Algodones dunes.- Regional climatic setting.- Geomorphology of the Algodones dunes and East Mesa Aeolian deposits.- Mineralogy and trace element geochemistry.- Summary and conclusions.- Acknowledgments.- References.- 4 Potential Transport of Windblown Sand: Influence of Surface Roughness and Assessment with Radar Data.- Effect of roughness on aeolian processes.- Field data.- Analysis and discussion.- Conclusions.- Acknowledgments.- Appendix 1: Field site description.- Appendix 2: Reduction of wind data.- References.- 5 Sand Transport Paths in the Mojave Desert, Southwestern United States.- Background.- Sand transport paths.- Discussion.- Future work.- Concluding remarks.- Acknowledgments.- References.- 6 Field Methods in a Study of the Process-Response Systems Controlling Dune Morphology, Salton Sea, California.- Study area.- Field methods and instrumentation.- Discussion.- Summary.- Acknowledgments.- References.- 7 Barchan Dunes of the Salton Sea Region, California.- Physical setting.- Dune forms.- Dune motion.- The evolution of the Salton dunefield.- Summary.- Acknowledgments.- References.- 8 Aeolian Modifications of Glacial Moraines at Bishop Creek, Eastern California.- Physical setting.- Methods.- Results and discussion.- Geomorphic implications.- Conclusions.- Acknowledgments.- References.- 9 Alterations of Ventifact Surfaces at the Glacier/Desert Interface.- Surficial alteration of ventifacts.- Results and discussion.- Conclusions.- Acknowledgments.- References.- 10 Fine Material in Rock Fractures: Aeolian Dust or Weathering?.- Methods.- Results.- Discussion.- Acknowledgments.- References.- 11 Modeling Seasonal Patterns of Blowing Dust on the Southern High Plains.- Model objectives.- Model synopsis.- Long-term application.- Results and discussion.- Conclusion.- Acknowledgments.- References.- 12 Reversed Desertification on Sand Dunes Along the Sinai/Negev Border.- Study site and methods.- Analysis and results.- Discussion and conclusions.- Acknowledgments.- References.- 13 A Review of the Effects of Surface Moisture Content on Aeolian Sand Transport.- Empirical models: threshold effects.- Empirical models: transport rates.- Theoretical models: threshold effects.- Theoretical models: transport.- Comparison of threshold models.- Implications for transport rate prediction.- Concluding remarks.- Acknowledgments.- References.- 14 Wind Abrasion and Ventifact Formation in California.- Ventifacts: general observations.- Formation of ventifacts.- Ventifacts in California.- Conclusions.- Acknowledgments.- References.
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