GL67

Site: GL67	Land Unit: Monivae Basalt
*Aust. Soil Class.:* Vertic, Mottled-Subnatric, Grey SODOSOL (confidence level 3)

Soil pit GL67 auger

General Land Unit Description:
The level to gently undulating basalt plains between Branxholm and Glenthompson consist of an association of Vertic or Ferric Brown Chromosols and Ferric Brown Sodosols. The Chromosols typically occur on the upper slopes and crests of very slight rises that may have scattered surface boulders, and Sodosols on the lower slopes and depressions. Sodosols or Vertosols, occasionally with a sporadic bleached subsurface horizon, are usually found in open depressions or drainage lines.

Site Description:

Slope: 2%	Geology: Quaternary basalt
Landform pattern: Level to gently undulating plains	Position in landscape: Mid-slope
Internal drainage: Imperfectly drained

Soil Profile Morphology

A1	0-25 cm	Dark greyish brown (10YR4/2) clay loam, medium to strong subangular blocky structure (5-10 mm), firm consistence when dry, pH 6.7. Transition to:
A3	25-35 cm	Dark greyish brown (10YR4/2) silty clay, apedal structure, firm consistence when dry, few small subrounded ferruginious and manganiferous nodules (2-5 mm), pH 5.8. Transition to:
	Subsoil
B21	35-80 cm	Dark greyish brown (10YR4/2) medium heavy clay, very faint yellow and orange weathered basalt mottles are common, medium to strong polyhedral structure (5-10 mm), very firm consistence when moderately moist, very few ferruginious and manganiferous nodules, pH 6.1. Transition to:
B22	80-120 cm	Light olive brown (2.5Y5/4) heavy clay, many distinct orange and yellow mottles, very firm consistence when moist, pH 6.2.

Key profile features:

Strong texture contrast between topsoil and subsoil
Mottled subsoil
A3 horizon dispersive when worked when wet

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