Sandstone distribution at the 14At1 level in the E-G area, south central Bredasdorp Basin: implications for a predictive depositional model

In the E-G sub-basin of the south central Bredasdorp Basin, an Albian age unconformity, termed the 14At1 surface, displays an erosional topography of submarine channels. Gamma ray log motifs, together with seismic, and petrographic evidence in the form of sidewall cores and drill cuttings, suggest that these sandstones were deposited in a submarine fan environment. It is proposed that these fans represent the first phase of sedimentation on the 14At1 surface, during sea-level lowstand conditions. 2 figs., 2 refs