GL66

Site: GL66	Land Unit: Monivae Basalt
*Aust. Soil Class.:* Vertic, Eutrophic, Brown CHROMOSOL (confidence level 2)

Soil pit GL66 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:

Geology: Quaternary basalt	Landform pattern: Plain
Position in landscape: Flat	Internal drainage: Moderately well drained

Soil Profile Morphology

A11	0-15 cm	Very dark grey (10YR3/1) clay loam, strong subangular blocky structure (2-5 mm), very firm consistence when dry, pH 5.4. Transition to:
A12	15-30 cm	Very dark greyish brown (10YR3/2) light clay, massive structure, very firm consistence when dry, abundant small subrounded ferruginious and manganiferous nodules, pH 5.5. Transition to:
	Subsoil
B21	30-50 cm	Brown (10YR4/3) medium heavy clay, moderate subangular blocky structure (2-5 mm), very firm consistence when dry, many small subrounded ferruginious and manganiferous nodules (2-6 mm), pH 6.1. Transition to:
B22	50-90 cm	Yellowish brown (10YR5/6) medium heavy clay, weathered gravel, red and orange mottles, weak structure, strong consistence when dry, abundant small subrounded ferruginious and manganiferous nodules, pH 6.7. Transition to:
B3	90-155 cm	Dark yellowish brown (10YR3/6) heavy clay, weathered gravel, red, orange and grey mottles, weak structure, consistence strong when dry, pH 7.3. Transition to:

Key profile features:

Acidic topsoil
Strong texture contrast between topsoil and subsoil
Sodic subsoil
Ferromanganiferious horizons
Mottled subsoil
Subsoil cracks at depth

Page top