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Site: GL102Land Unit: Merino Tablelands
Aust. Soil Class.: Melanic, Subnatric, Brown SODOSOL (confidence level 1)

Soil pit GL102 landscape

General Land Unit Description:
In the steeper dissected valleys, where the duricrust has been eroded, weathered parent material becomes exposed. The major soil type occurring on the steeper slopes leading off the flat surface of the Dundas Tablelands is a Brown Chromosol, typically with a ferric horizon above the clay subsoil, similar to this site. The soil is 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 fluctuating watertables which occurred mainly in the Tertiary period.

Site Description:

Geology: Cainozoic duricrustLandform pattern: Rolling low hills
Position in landscape: CrestInternal drainage: Moderately well drained

Soil Profile Morphology

A10-15 cmVery dark greyish brown (10YR3/2), loamy sand, weak structure, firm consistence when dry, small round ferricrete pebbles are common (2-5 mm), pH 5.7. Transition to:

A315-30 cmDark brown (10YR3/3), sandy clay loam, apedal structure, firm consistence when dry, medium rounded ferruginised nodules are abundant (5-10 mm), pH 6.0. Transition to:

B2130-50 cmYellowish brown (10YR5/6), sandy light clay, weak to apedal structure, pH 6.2.

Key profile features:

  • Ferruginous nodules are abundant above the clay
  • Strong textural contrast between topsoil and subsoil
Soil pit GL102 graphs
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