The tectonostratigraphic framework study undertaken by Geoscience Australia during 1996-97 includes twenty-two sequences (BB1 to BB22), ranging in age from Carboniferous to late Tertiary. These sequences correlate to six tectonically-controlled basin phases and reflect the evolution of the basin from a Palaeozoic intra-cratonic rift basin to a passive margin basin following breakup in the Callovian.