Marine Carbon Reservoir Age estimates for the Far Southern Coast of Peru
AuthorOwen, Bruce D.
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CitationOwen, B. D. (2002). Marine carbon reservoir age estimates for the far south coast of Peru. Radiocarbon, 44(3), 701-708.
AbstractIn order to estimate the apparent age of seawater (R) and the corresponding local offset from the global marine radiocarbon calibration curve (Delta-R) on the far south coast of Peru for 2 periods in the past, 6 pairs of associated marine shell and unburned wood samples from archaeological excavations at Loreto Viejo were 14C dated. Three pairs from about cal AD 1280-1380 indicated larger and more variable Delta-R estimates than have been obtained for other periods in nearby regions, suggesting that Delta-R may vary considerably over space and/or time. Three pairs from about 1870-1680 cal BC yielded consistent shell dates, but only one reasonable terrestrial date and Delta-R estimate, probably due to stratigraphic mixing in antiquity. The one early Delta-R estimate falls slightly outside the range of the later ones, suggesting either still greater spatial variability in Delta-R, or some temporal variability.