6.1.1 Eruption points of the Volcanic Western Plains

The most obvious features — scoria cones, lava cones, composite (scoria-lava) cones, and maars — indicate the places of last eruptive activity. Mount Anakie (398 m) and Mount Elephant (393 m) on the eastern and western boundary of the CCMA region respectively, form the highest cones. Some of the maars and craters contain lakes, such as Lake Purrumbete, Lake Bullen Merri and Lake Gnotuk.

Associated soil types include shallow to moderately deep friable (black, red or brown) gradational soils often stony.

Soil-landform units

Soil-landform unit	Original unit ID	Unit description	Area (km²)
36	35, 36	Low cone and gently inclined slopes (Mount Widderin)	8
43	63	Moderately inclined low cones (e.g. Mount Moriac)	9
97	37	Steep, high cone (Mount Elephant)	3
98	113	Low hills and rises of volcanic cones (Mount Leura)	9
99	139	Moderately inclined high cone (Mount Gellibrand)	1
100	129	Steep low cones (Mount Porndon)	3
101	135	Undulating low hills (e.g. Red Rock)	18
102	258	Steep low cone (south-east of Anakie)	2
103	31	Undulating low hills and rises (Irrewarra)	8
104	225	Moderately inclined low cone (Mount Pollock)	4
105	134	Low volcanic cones (Nalingal)	4
106	142, 256	Low hils and volcanic cones (Mount Rebecca and Gow Hill)	3
107	113	Maars and inner adjoining slopes (e.g. Lake Gnotuk)	1
108	115	Undulating rises-maar (west of Cobden)	1
109	130	Undulating rises-maar (Lake Purrumbete)	7
110	113	Gently undulating low basalt hills (Camperdown)	45
111	136	Low hills (e.g. Wiridgil Hill)	14

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