|Clay plains frequently occur at slightly higher elevations than the boinkas. Such plains are extensive to the north and west of Lake Tyrrell and to the north-west, south-west and south of the Raak Plain. Gilgaied grey clays with subsoil gypsum predominate, grading with depth to coarsely-mottled red, white and grey clays. These highly weathered profiles have developed on Blanchetown Clay. The original vegetation is distinctive, being tall open mallee. Thus, boundaries to adjacent units are clear. The clays are partly buried in several areas, mostly by aeolian materials.|
To the south-west of the Raak Plain there are some large plains enclosed and separated mostly by siliceous dunefields. The vegetation is distinctive, consisting of grassland, woodland of Pine, Belah, Buloke and tall mallee with halophytic shrub understorey. There are occasional salinas. In addition to the grey clay soils (Vertosols) there are red Sodosols apparently formed in a veneer of parna. There are also sandy plains and low dunes derived from adjacent areas of Lowan Sand and Woorinen Formation, probably redistributed by the incursion of floodwaters.
Extensive plains to the south-west of Mildura are terraced. Grey Vertosols and Red Sodosols occupy the lower levels which support grasslands and woodlands of belah with halophytic shrub understorey. The higher levels are composed of Bungunnia Limestone deposited as Lake Bungunnia finally dried up. Grey brown Calcarosols with fine-earth lime to the surface overlie nodular limestone. Vegetation is largely tall open mallee with halophytic shrubs. Limestone terraces have also been noted in the Tyrrell Depression, but here they are relatively subdued.