Koonwarra, sand overlay (Ko,s)
North and west of Inverloch, is an area where sand from the dunes to the west have been blown eastwards. This has formed a shallow mantle of sand over the original Koonwarra soil that was developed on Cretaceous sediments.
Koonwarra sand overlay has a very dark grey loamy sand surface soil (about 30 cm deep) overlying light grey sand. Mottled grey and yellowish brown light to medium clays abruptly occur deeper in the soil profile, usually before 80 cm. There are smaller areas within this mapping unit where the sand may exceed 1 metre.
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