Victorian Resources Online (archived)
MM246
| Site: MM246 | Land Unit: Lunette |
| Aust. Soil Class.: Haplic, Hypercalcic, Red CHROMOSOL (confidence level 3) | |
| General Land Unit Description: Lunettes form on the eastern edge of many lakes and swamps throughout the study area. They are generally formed as low rises from wind blown material from the dry beds of the waterbodies and deposited on their leeside during drier climatic periods. Due to restrictions of scale, some lunettes have been too small to be mapped. The soil types on the lunettes are quite variable depending on the nature of the material blown from the bed of the water body. There is often a sandy topsoil over clay and calcium carbonate is often present. |
Site Description:
| Geology: Coarse unconsolidated | Landform pattern: Low rise |
| Position in landscape: Lunette crest | Internal drainage: Imperfectly drained |
| A1 | 0-15 cm | Dark reddish brown (5YR3/4) fine sandy clay loam, weakly structured, weak consistence when dry, pH 5.6. Sharp transition to: |
| Subsoil | ||
| B21 | 15-40 cm | Reddish brown (5YR4/4) medium clay, strong blocky structure (10-20 mm), very firm consistence when dry, pH 6.2. Clear transition to: |
| B22 | 40-60 cm | Dark red (2.5YR3/6) medium clay, strong blocky structure (10-20 mm), very firm consistence when dry, pH 7.3. Clear transition to: |
| B23 | 60-110 cm | Pale brown (10YR6/3) medium clay, with red mottles, strong blocky structure (10-20 mm), firm consistence when moist, soft carbonate nodules are common, pH 8.6. Clear transition to: |
| B24 | 110-150 cm | Light yellowish brown (2.5Y6/4) medium clay, strong blocky structure (10-20 mm), firm consistence when moist, soft carbonate nodules are common, pH 9.0. Clear transition to: |
| B25 | 150+ cm | Pale yellow (5Y7/3) medium clay, very firm consistence when moist, soft carbonate nodules are common, pH 9.0. |
Key profile features:
- Strong texture contrast between topsoil and subsoil
- Calcium carbonate at depth
- Strongly alkaline subsoil
