Uranium-series dating of fossil shells and bone yielded an average age of 127,000 ± 8,000 yr for the fossiliferous deposit of the South Bight II marine transgression at Amchitka Island, Aleutians. These Pleistocene beds were deposited during an interglacial high sea stand contemporaneous with the well-dated period of coral-reef formation on Hawaii and Barbados about 125,000 yr ago.

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