These map units are associated with unconsolidated Quaternary sediments, predominantly sands but with numerous occurrences of silts, clays and marl. The topography consists of low dune and depression (swale) sequences, broad plain units and shallow drainage depressions. These units are associated with the coastal areas of the region, located behind the foreshore dunes and south of the Tertiary deposits. The soils tend to have uniform (coarse) and duplex profiles with sandy surfaces and often with a humic or siliceous pan at variable depth. The native vegetation consists of Lowland Sclerophyll Forest, Coastal Sclerophyll Forest, Coastal Banksia Woodland, Banksia Woodland and Coastal Heath. Geology: Qra, Qrc, Qrp Recent (Quaternary) alluvium. Gravel, sand, silt, clay and marl. Rainfall: 700-1000 mm per annum. Slope: 0-10%, often less than 3%. Dominant landform element: Plain, rise. Minor landform element: Drainage depression, open depression. |