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The average 230Th ages of samples from the Norfolk Formation, and from later- and earlier-deposited sediments of the Wando Formation are 71 000, 87 000, and 129 000 yr, and they appear to correlate with oxygen isotope substages 5a, 5c and 5e, respectively. The average 230 Th age of samples from beds of the Rappahannock Rver, Ponzer, and Ten Mile Hill localities is 212 000 yr, and they correlate with oxygen isotope stage 7. The sediment of the Canepatch Formation is 460 000 yr old, and it is tentatively correlated with oxygen isotope stage 11. There is general agreement between uranium-series and uranium-trend dates and between the quantitative trends of the amino acid data and uranium-series dates. The amino acid values, however, are unacceptably high in at least two groups of samples, those from localities near Charleston, South Carolina, and from central Virginia. -from Author
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Uranium-series dating of fossil corals from marine sediments of southeastern United States Atlantic Coastal Plain.