Sand Dunes

1.0 Introduction 1.1 What are Sand Dunes? McHenry [1] (1993, p. 406) states, "A sand dune is a hill, mound or ridge of accumulated sand and loose material, which is formed by wind action." They are natural structures that protect the coastal environment by absorbing energy from wind, tide and wave action. 1.2 Formation of Sand Dunes Sand dunes are formed by accretion, which is the increase of land by the action of natural forces. Any part of the upper beach, …

…amp;lt;Tab/>Huxley, L and Walter, M 2000, Biology: An Australian Perspective, Oxford University Press, Melbourne 4.<Tab/>Department of Geography, Michigan State University, Dunes, viewed 21 May 2006, http://www.geo.msu.edu/geo333/dunes.html 5.<Tab/>Cambridge University, Coastal Sand Dune Ecosystems, viewed 17 May 2006 http://www.spectrum.troy.edu/~greipsso/research.html <Tab/>5.<Tab/>Timson, S 2006, Personal Communication