GEOMORPHOLOGY REPORT - CRC LEME

Figure 6. Compartmentalisation of the Murray River incised valley fill into terrace and
floodplain deposits of different ages. Upper terrace is composed of Rufus Formation.
5.1.1 Uplands
The uplands have sandy regolith, slightly more clayey in the swales, developed on the dunes
of the Woorinen Formation (Figure , Figure 8). Soils are well-drained and sandy to sandy
loams, with moderate amounts of carbonate in the intermediate dunes. Generally these areas
are cleared for cropping (Figure 1, Figure 8).
5.1.2 Alluvial terrace
This unit consists of clay and fine sandy alluvium, and is composed of the Rufus Formation of
Gill (1973). The terrace surface has a discontinuous cover of sand dunes (~Woorinen
Formation). It is about 60,000 years old (Rogers and Gatehouse 1990). The terrace is very
flat, with local orange sand dunes and sand sheets. Where there is no sand the surface of the
terrace consists of olive-khaki silty clays. Most soils are slightly to moderately saline. Loamy
sands of relict dunes locally overlay the floodplain clays (Figure ).
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