GL123

Site: GL123	Land Unit: Dundas Redgum
*Aust. Soil Class.:* Ferric (Reticulate), ?, Brown CHROMOSOL (confidence level 2)

Soil pit GL123 auger

General Land Unit Description:
The flat surface of the Dundas Tablelands predominantly consists of Brown 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.

Site Description:

Geology: Cainozoic duricrust	Landform pattern: Level plain
Position in landscape: Flat	Internal drainage: Moderately well drained

Soil Profile Morphology

A11	0-5 cm	Sandy loam, pH 7. Transition to:
A12	5-35 cm	Sandy loam, pH 6. Transition to:
A13	35-55 cm	Sandy loam, ferruginised nodules are abundant, pH 6. Transition to:
	Subsoil
B22	55-90 cm	Yellowish brown (10YR5/6) clay, many prominent yellow, orange and brown mottles, many ferruginous nodules, pH 6.5. Transition to:
BC	90-130 cm	‘Tiger mottles’
C	130+ cm	Kaolinite

Key profile features:

Strong textural contrast between topsoil and subsoil
Ferric horizon
Mottled subsoil

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