Differences in elevation of stranded shorelines in Gippsland and Oahu are explained by regular uplift of one area relative to the other. Both areas are rising with reference to Mangaia, Cook Islands, which is presumed to be stable. The mean long-term rate of rise for Oahu in the Pleistocene, after Pliocene subsidence and late Pliocene to Pleistocene marine transgression through at least 185 m, is estimated to be 1.6 cm per 1,000 yrs.

Ages derived from an earlier comparison of Gippsland shorelines with others on the Atlantic Coastal Plain in South Carolina are in agreement with K-Ar analyses of basalt associated with the Hawaiian shorelines.

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