Victorian Resources Online (archived)
GL17
| Site: GL17 | Land Unit: Dundas Redgum |
| Aust. Soil Class.: Mottled, Natric, Black KUROSOL (confidence level 1) |
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General Land Unit Description: The flat surface of the Dundas Tablelands predominantly consists of Brown Chromosols and to a lesser extent Yellow Chromosols with a ferric horizon, typically occurring above the clay subsoil. The soil is commonly developed over a highly weathered mottled zone. This red and white mottling, sometimes referred to as ‘tiger mottles’, is thought to be the result of deep chemical weathering which occurred during the late Tertiary period. Red gums are the dominant vegetation found on this surface. This site occurs on a drainage depression and therefore the topsoil may be a result of more recent accumulation. |
Site Description:
| Geology: Cainozoic duricrust | Landform pattern: Level to gently undulating plain |
| Position in landscape: Lower slope / drainage depression | Internal drainage: Imperfectly drained |
Soil Profile Morphology
| A11 | 0-5 cm | Very dark brown (10YR2/2) loamy sand, weak subangular blocky structure (2-10 mm), pH 6.0; transition to: |
| A12 | 5-25 cm | Very dark grey (10YR3/2) loamy sand, massive structure, pH 6.0; diffuse transition to: |
| A13 | 25-45 cm | Very dark greyish brown (10YR3/2) sand, bleached (10YR6/1) when dry, massive structure, pH 6.0; clear transition to: |
| Subsoil | ||
| B21 | 45-80 cm | Very dark greyish brown (10YR3/2) medium heavy clay, many faint orange and yellow mottles, weak subangular blocky structure (5-15 mm), pH 5.3; abrupt transition to: |
| B22 | 80-120 cm | Reddish brown (2.5YR4/3) medium clay, many distinct yellow and orange mottles, weak subangular blocky structure (5-20 cm), few coarse fragments, pH 5.4. |
| BC | 120-180+ cm | pH 6.4. |
- Deep sandy topsoil
- Strongly acidic subsoil
- Strong texture contrast between topsoil and subsoil
- Strongly sodic subsoil at depth
- Bleached A2 horizon
- Mottled subsoil
