The resulting map shows the net-sand distribution of shelf areas contoured parallel to the shelf edge and slope areas contoured parallel to the depositional dip of the slope valleys down which the sand was transported. The distribution of sand within the depositional dip-oriented isopachs is consistent with the regional pattern of downslope-oriented salt withdrawal valleys bounded by salt-cored anticlines (Figures 4-6 and 4-41). Note the lowstand position of the middle-to-outer neritic biofacies boundary, below which few waves reach the sea floor. This results in downslope sand distribution being controlled by bottom currents alone. | The resulting map shows the net-sand distribution of shelf areas contoured parallel to the shelf edge and slope areas contoured parallel to the depositional dip of the slope valleys down which the sand was transported. The distribution of sand within the depositional dip-oriented isopachs is consistent with the regional pattern of downslope-oriented salt withdrawal valleys bounded by salt-cored anticlines (Figures 4-6 and 4-41). Note the lowstand position of the middle-to-outer neritic biofacies boundary, below which few waves reach the sea floor. This results in downslope sand distribution being controlled by bottom currents alone. |