In this book, the authors present current research in the study of the conservation, types and desertification of sand dunes. Topics discussed include the aridisation, dune dissipation and pedogenesis in the Quarternary of Eastern Pampean sand sea; desert sand dunes for sulfur concrete production; Allocosa brasiliensis as a model towards the conservation of coastal sand dunes in Uruguay; and, the causes, impacts and control of desertification.