• "...appears to have been largely derived from a terrain of sedimentary quartzite and argillite."

• "The most common lithology is grey medium-grained moderately sorted quartz sandstone and orthoquartzite. Rare leached calcareous pods, bands and lenses are scattered throughout the formation which is 200 m thick. The lowest beds are phyllitic with thin bands of dark graphitic limestone. They pass abruptly into predominantly quartzitic, thick-bedded strat which characterise the rest of the formation. The upper few hundred feet of strata include poorly sorted, muddy sandstone and bioturbated siltstone and fine sandstone, wtih bands of hard white quartzite, coarse quartz sandstone and grit, and dark cleaved argilllite. Leached fossiliferous calcareous pods in the upper part of the formation are most probably not tuffaceous as thought by Cooper (1965). [This sections described.]"