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40 Red and black strongly structured gradational and uniform soils (earths and loams) on Quaternary basic volcanics

These soils occur on basic volcanic deposits in well drained areas and positions, such as eruption points and associated scoria and ash deposits in both the south-west of the CMA and east of Ballarat in the Western Uplands, as well as scattered occurrences on the basaltic volcanic plains including many stony rises. These soils are strongly (moderate and fine) structured throughout with dark friable clay loam to light clay surface soils (10–50 cm depth) grading into dark or red clay loam to medium clays, which generally grade into the parent material at well over 100 cm (BD5, SW26) or may be shallower on stony terrain (SW96) at about 40–60 cm.

Notable characteristics include: the gradational increase in clay content with depth, high clay content, strong fine structure (high pedality), slightly acidic to neutral pH, high free iron content, and high nutrient levels.		CLRA Soil Unit 40


Soil Sites

Site Code
Soil-landform unit
Component
ASC
FK
1:100 000 mapsheet
Mid slopeMelanic, Eutrophic, Red FerrosolGn4.12T7622 - Ballarat
Simple slopeHaplic, Eutrophic, Red FerrosolGn4.12T7622 - Ballarat
Simple slopeMelanic, Eutrophic, Red FerrosolFn4.12T7622 - Ballarat
CrestMelanic, Eutrophic, Red FerrosolGn4.12T7622 - Ballarat
Lower slope Sodic, Eutrohpic, Brown Dermosol (Ferrosol?)Gn3.22T7621 - Colac
PlainHumose, Calcic, Black Dermosol (Ferrosol?)Gn3.43T7521 - Corangamite
Upper slopeVertic (& Sodic), Calcic, Black DermosolGn3.43T7721 - Geelong
SW97
Simple slopeVertic (& Sodic), Calcic, Black DermosolGn3.43, Gn3.93T7721 - Geelong
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