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Radiocarbon dates from known age, pre-bomb eastern oyster (Crassostrea virginica) shells provide local marine reservoir corrections (∆R) for Chesapeake Bay and the Middle Atlantic coastal area of eastern North America. These data suggest subregional variability in ∆R, ranging from 148±46 14 Cyr on the Potomac River to −109±38 14 Cyr at Swan Point, Maryland. The ∆R weighted mean for...
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