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6.1.3 Volcanic Western Plains with poorly developed drainage

The plains of the Newer Volcanic basalts that formed in the Late Pliocene and during the Pleistocene are generally characterised by thinner regolith development and poorly developed drainage. In these landscapes, flow boundaries are obvious, and corestones (‘floaters’) are often seen at the surface. Shallow drainage lines have developed, often along the boundaries of lava flows. Discontinuous drainage lines may end at ephemeral wetlands and swamps. Examples of this landform occur in the region from Warrambine to Armytage, with the best examples immediately north of the Wingeel Swamp.

Associated soil types are sodic and non-sodic texture contrast (moderately deep to deep) soils and some gradational (shallow to moderately deep) soils.

Geomorphic unit 6.1.3

Soil-landform units

Soil-landform unit
Original unit ID
Unit description
Area (km2)
84
Low hills (east of Maude)
2
62
Low hills (Mount Duneed)
4
109
Undulating low basalt hills (Warncoort)
5
79
Gently undulating plains (e.g. Berrybank)
620
81
Stony rise, undulating plain with occasional steep hills (volcanic cones) (e.g. Warrambine)
437
86
Undulating rises (e.g. Geringhap)
321
126
Gently undulating rises (e.g. Mount Meningorot)
5
229
Undulating rises and broad plains (Anakie East)
166
40
Gently undulating plains (Anakie East)
166
132
Gently undulating plains (Coragulac)
28
134
Undulating rises (Nalangil)
4
143
Gently undualting plains (east of Wingeel)
57
231
Undulating rises (east of Lara)
8
25
Gently undulating basalt plain (Cloven Hills()
180
72
Undulating rises (south of Anakie()
10
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