Between the Lachlan Fold Belt to the east and the Adelaide Fold Belt to the west is the Murray Basin, tectonic uplift on the western margin during the early Pleistocene dammed a section of the Murray River which formed Lake Bungunnia. The lake deposited the Blanchetown Clay, to the northwest uplift increased the rate of erosion and deposited the colluvial Pooraka Formation, towards the east and to the north, fluvial sedimentation deposited the Shepparton Formation and the Riverine Plane.
Uplift along the western margin of the Murray Basin during the early Pleistocene lead to the tectonic damming of the Murray River which formed Lake Bungunnia, resulting in the deposition of the Blanchetown Clay - EDIT LATER
Limestone, echinoidal, bryzoal, crinoidal; sandstone, calcareous, minor carbonaceous clay and silt.
Miocene, Middle to Oligocene, Late
Australian Government, Geoscience Australia. (n.d.). Saddleworth Formation | Australian Stratigraphic Units Database, Geoscience Australia. Last update: September 3, 2019.
South Australian Government. (n.d.). SARIG geological map. SARIG.
Kingham, R.A. (1998). Geology of the Murray-Darling Basin — Simplified Lithostratigraphic Groupings. Australian Geological Survey Organisation, Record 1998/21