Figure 16, Text Version.  Map view and theoretical cross-section show how the surface calculations would be done in the early Holocene when there were only bay and shelf deposits.

The amount of sediment deposited on the shelf assumes a constant sedimentation rate since the last lowstand of sea level 14,000 years ago. Therefore, at 13,000 years before present, 1/14^th of the total sediment above the ravinement surface would have been deposited. At 12,000 years before present, 2/14^th of the total sediment would have been deposited and so forth.

The depth of sea level 10,000 years before present was measured from the sea level curve to be 47 meters. The 47 meter contour is shown on the map of the ravinement surface. This contour line serves as the boundary between shelf and bay deposits.

2/7^th of the sediment thickness from the ravinement surface to the present day surface is deposited on the shelf where this amount does not cause the new surface to be shallower than 47 meter depth. In those places simply fill with sediment to the 47 meter isobath.

Bays fill to the 47 meter isobath. This assumes that sedimentation keeps pace with sea level rise.

The images also shows the ravinement surface, lowstand surface, intersection of sea level curve with ravinement surface, shelf deposits and bay deposits.