Abstract

An ancient calcareous beach deposit is exposed in several quarries on Oahu, Hawaii, 25 ft (7.5 m) above mean sea level and is overlain by a reef of the 95-ft (29-m) stand of the sea of Yarmouth interglacial age. A solution unconformity separates the two deposits, indicating that the sea fell lower than 25 ft after the beach rock was deposited.

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