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Event description
About this Event
Swan Coastal Plain is the low, dune-rich area between the Darling Scarp and the sea, stretching from Cape Naturaliste in the south, to north of the city of Perth. During the last Glacial sea-level low-stand the plain extended to the edge of the present continental shelf. The surface is dominated by a variety of mainly infertile, Pleistocene sands of mixed fluvial, marine and aeolian origin as well as wetland muds. Rivers drain from the topographically high Yilgarn Craton to the east across the plain, forming significant wetlands and estuaries. The Swan River forms the largest estuary, and its former channel can be traced across the shelf to a deep off-shore canyon, dissecting the shelf edge. The resulting microenvironmental mosaic on the present-day plain and its Pleistocene precursor is a central element in the development of the major botanical diversity hotspot in southwestern WA – now also home to most of Western Australia's human population.