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6.2.2 Dissected plains, rises and low hills of the Sedimentary Western Plains

In the Heytesbury region the drainage has been strongly influenced by the deposition of strand lines from the retreating sea, forming a rectilinear pattern of parallel arcuate tributaries perpendicular to rivers draining south-west. The development of the drainage has been associated with the Late Neogene uplift of the adjacent Otways Ranges, between 2 Ma and 1 Ma (Sandiford 2003). The deep dissection has resulted in numerous landslides in the marl, many of which remain active.

Associated soil types include acidic mottled texture contrast soils, acidic gradational soils, some sandy some with high organic matter content.

Geomorphic unit 6.2.2
Soil-landform units

Soil-landform unit
Original unit ID
Unit description
Area (km2)
Tomawhawk Creek L.S.Deep valleys (dissected leteritic plateaux)
134
Anglesea L.S.Coastal moderately dissected hills
39
165
Gently undulating rises (Jancourt)
12
Bellbrae L.S.Rolling hills (dissected lateritic plateaux)
18
Waare L.S.Dissected rolling hills with remnant plain cappings
73
140
Undulating plains with fault scaprs (Timboon West)
111
141
Undulating low hills (Paaratte)
134
163
Gently undulating ridge crests (Elingamite)
11
Waare L.S.Dissected rolling hills with remnant plain cappings
79
Waare L.S.Roling hills
117
20
Undulating alluvial plains and valley sides (Curdies River)
148
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