MM305

Site: MM305	Land Unit: Naroghid Basalts
*Aust. Soil Class.:* Bleached-Ferric, ?, Black CHROMOSOL (confidence level 4)

General Land Unit Description:
The undulating basalt hills around Camperdown consist of Black Chromosols that may have a bleached horizon or have vertic properties in the subsoil. There are minor occurrences of friable Mottled Black Chromosols on the hillslopes, and friable Red Ferrosols, Dermosols or Chromosols on the upper slopes and crests. The cones within the map unit are friable, Red or Black Chromosols, and the maars are neutral Mottled Black Chromosols, black cracking clays (Vertosols) or they are water-filled.

Site Description:

Geology: Quaternary basalt	Landform pattern: Undulating low hills
Position in landscape: Upper slope	Internal drainage: Moderately well drained

Soil Profile Morphology

A1	0-20 cm	Very dark brown (10YR2/2) clay loam, firm surface condition, very weak consistence when moist, pH 5.8. Clear transition to:
A2	20-50 cm	Sporadically bleached when dry (10YR7/2) clay loam, very weak consistence when moist, many ferromanganiferous nodules, pH 6.1. Sharp transition to:
	Subsoil
B21	50-70 cm	Very dark greyish brown (10YR3/2) medium clay, dark yellowish brown mottles, strong blocky structure (20-50 mm), consistence very firm when moist, pH 6.6. Gradual transition to:
B22	70+ cm	Dark greyish brown (10YR4/2) medium clay, yellowish brown mottles, strong blocky structure (20-50 mm), firm consistence when moist, pH 7.0.

Key profile features:

Strong texture contrast between topsoil and subsoil
Bleached A2 horizon
Mottled subsoil
Many ferromanganiferious in A2 horizon

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