MM829

Site: MM829

Land Unit: Mount Clay Rises

Aust. Soil Class.: Ferric, ?, Brown CHROMOSOL (confidence level 4)

General Land Unit Description:
This site has been mapped as Tertiary Marl, but it is a basalt soil derived from colluvial wash off Mount Clay. The geology, and hence the soils are very mixed in this area.

Site Description:

Geology: Quaternary basalt

Landform pattern: Gently undulating plain

Position in landscape: Open depression

Internal drainage: Moderately well drained

Soil Profile Morphology

0-30 cm

Very dark greyish brown (10YR3/2) fine sandy loam, pH 5.6. Clear transition to:

30-50 cm

Yellowish brown (10YR5/4) sandy clay loam, weak blocky structure, ferromanganiferous nodules are abundant. Sharp transition to:

Subsoil

B21

50-65 cm

Yellowish brown (10YR5/6) medium clay, red mottles (2.5YR4/6), pH 6.4. Transition to:

B22

65+ cm

Yellowish brown (10YR5/6) medium clay, red mottles (2.5YR4/6), pH 6.5.

Key profile features:

Strong texture contrast between topsoil and subsoil

Ferromanganiferious nodules are abundant in A2 horizon

Mottled subsoil

Subsoil dispersive when worked when wet

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