MM889

Site: MM889	Land Unit: Macarthur Basalts
*Aust. Soil Class.:* Bleached-Ferric, ?, Brown CHROMOSOL (confidence level 2).

General Land Unit Description:
The undulating rises to the west of Macarthur consist of Mottled Brown Chromosols with sporadically bleached subsurface horizons. Black Endohypersodic Vertosols are predominant on the flats which are the prominent landscape element of this unit. Minor shallow Mottled Brown Chromosols occur on slopes and crests also.

Site Description:

Geology: Quaternary basalt	Landform pattern: Undulating rises
Position in landscape: Flat	Internal drainage: Imperfectly drained

Soil Profile Morphology

A1	0-20 cm	Dark reddish brown (5YR3/3) fine sandy loam, hardsetting surface, pH 5.2. Clear transition to:
A2	20-30 cm	Yellowish red (5YR4/6) fine sandy clay loam, bleached (5YR7/3) when dry, many ferromanganiferous nodules. Sharp transition to:
	Subsoil
B21	30-50 cm	Strong brown (7.5YR4/6) medium clay, strong blocky structure (5-10 mm), pH 6.2. Gradual transition to:
B22	50+ cm	Yellowish brown (10YR5/6) medium clay, red mottles (2.5YR4/6), strong blocky structure (5-10 mm), pH 6.4.

Key profile features:

Strongly acidic topsoil
Hardsetting topsoil
Bleached A2 horizon
Many ferromanganiferious nodules in A2 horizon
Mottled subsoil

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