Test surveys could not trace the lithic sandstone-quartzite interface beneath the Lagoon area, but traced the lithic sandstone-dolomite interface in the Main Open Cut area with good accuracy.

Reports describe the results of two attempts to use seismic refraction methods to map an unconformable subsurface interface between lithic sandstone and quartzite units within the Whyalla Sandstone. This palaeosurface is important as a locus for...