GL108

Site: GL108	Land Unit: Dundas Redgum
*Aust. Soil Class.:* Ferric (Reticulate?), Eutrophic, Brown CHROMOSOL (confidence level 1)

Soil pit GL108 landscape

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:

Slope: 1%	Geology: Cainozoic duricrust
Landform pattern: Elevated plain/plateau	Position in landscape: Flat
Internal drainage: Moderately well - imperfectly drained

Soil Profile Morphology

A1	0-10 cm	Brown (10YR5/3), sandy loam, massive structure, loose to very weak consistence when dry, a few small rounded ferruginised nodules (2-6 mm), pH 6.0. Sharp transition to:
A3	10-25 cm	Brown (10YR5/3), sandy clay loam, massive structure, very weak consistence when dry, subangular ferruginised nodules (6-20 mm) are abundant, pH 6.2. Sharp transition to:
	Subsoil
B21	25-50 cm	Dark yellowish brown (10YR4/4), light clay, a few medium faint to distinct yellowish brown (10YR5/6) mottles, weak prismatic structure, very firm consistence when dry, subplastic, very few medium organic root linings and soft segregations (2-6 mm), a few small subangular ferruginised nodules (2-6 mm), pH 6.9. Clear to gradual transition to:
B22	50-65+ cm	Dark yellowish brown (10YR4/4), light clay, a few faint to distinct medium yellowish brown (10YR5/6) mottles, weak to moderate prismatic structure, very firm consistence when moist, subplastic, very few medium organic root linings and soft segregations (2-6 mm), a subangular ferruginised nodules (2-6 mm) are common, pH 6.5.

Key profile features:

Ferruginous nodules are abundant above the clay
Possibly tiger mottles at depth

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