Geology - Recent lacustrine (lake or swamp) deposits.
Landform - Lacustrine plain.
Soils - This soil, named by Goudie (1942), occurs in the vicinity of the Cardinia Drain. The surface soil is about 200 mm deep and is a black friable clay. This passes into a black or dark grey plastic clay. At about 700 mm, a thin layer (about 100 mm) of black peaty clay overlies a grey impervious clay. Soil pit site information for two Dalmore clay soil profiles can be found for Sites GP23 and GP25. These soils are referred to as Self-mulching, Black VERTOSOLS using the Australian Soil Classification (Isbell 1996).
Typical profile of Dalmore Clay
0 - 200 mm. Black or very dark grey friable clay, clear transition to:
200 - 700 mm approx. Black or very dark grey plastic heavy clay, clear transition to:
700 - 800 mm. Black peaty clay or clayey decomposing peat. Abrupt transition to:
800 mm continuing to 1.5 m +. Grey impervious clay with yellow-brown mottles.