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Figure 7. Four of the major delta systems developed in the Tertiary based on estimated sand percentage from logs. The Fish River Delta system is inferred to be similar to the Aklak system, but data points are insufficient to make a sketch map of the delta. The sedimentary feeds were changing from southwest in the Paleocene to south in the Eocene and later.  

Click to view in sequence four major delta systems (from older to younger).