MM798

Site: MM798	Land Unit: Minjah Basalts
*Aust. Soil Class.:* Ferric, Mottled-Subnatric, Brown SODOSOL (confidence level 2)

General Land Unit Description:
The unit consists of an association of Mottled Yellow with Mottled Black Chromosols and Sodosols on the level and more poorly drained portions of the gently undulating plains in the Hawkesdale area. Ferric Brown Chromosols usually occur on the slopes and broad crests of very slight rises which have a few scattered surface stones. Water is usually ponded for 1-2 weeks/year and on the poorly drained portions of the plain between the rises.

Site Description:

Geology: Quaternary basalt	Landform pattern: Gently undulating plains
Position in landscape: Upper slope Crest	Internal drainage: Moderately well drained

Soil Profile Morphology

A1	0-15 cm	Dark brown (10YR3/3) clay loam, structureless, consistence very weak when moist, pH 5.0. Clear transition to:
A2	15-40 cm	Brown (10YR5/3) clay loam, bleached (10YR7/3) when dry, ferruginous nodules (<2 mm) are abundant. Sharp transition to:
	Subsoil
B21	40-60 cm	Yellowish brown (10YR5/6) medium clay, red mottles (2.5YR4/6), strong blocky structure (5-10 mm), pH 6.5. Transition to:
B22	60+ cm	Yellowish brown (10YR5/6) medium clay, red mottles (2.5YR4/6), strong blocky structure (5-10 mm), pH 6.0.

Key profile features:

Strongly acidic topsoil
Strong texture contrast between topsoil and subsoil
Bleached A2 horizon
Ferruginous nodules are abundant in A2 horizon
Mottled subsoil

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