The soil of the meander plain has the strongest texture contrast (Mitchell).
The larger silt content indicates sediments were deposited under a lower energy regime than the Old Alluvium meander plain.
In brief, the coarser sediments associated with the Old Alluvium meander plain in the west are characterised by intermediate-small [[sigma].
Again the coarser sediments of the Old Alluvium meander plain, Trangie Cowal, and Contemporary Macquarie pedoderms are characterised by small readings ([less than or equal to]100mS/m), while the larger readings (> 100 mS/m) coincide with the Gin Gin Hills.
In the west, and with respect to the EM38h, the coarse sediments of the Old Alluvium meander plain are characterised by intermediate-small [[sigma].
Conversely, the EM38 suggests the presence of more conductive sediments and given the location indicates the presence of texture contrast soil profiles associated with the Old Alluvium Meander Plain.
This may represent the location of a palaeochannel among the generally clayier part of the regolith associated with the Old Alluvium meander plain.
Various components of the Old Alluvium pedoderm, including the meander plain and infilled channels, are apparent.
The modelling also indicates where the Old Alluvium meander plain is juxtaposed with the Old Alluvium backplain.
Nevertheless, the intermittent nature of the modelled root-zone [sigma] represents the sharp transition often observed within the Old Alluvium pedoderm: from the clay-rich soil types of the meander plain and the sandier soil of the backplain (McKenzie 1992).
The modelling suggests that the palaeochannels may be directly connected to the prior streams commonly associated with the meander plain.
In the western third, the stratigraphic nature of the soil and sediments associated with the old meander backplain and meander plain can be inferred.