Anomalous AMS Radiocarbon Ages for Foraminifera from High-Deposition-Rate Ocean Sediments

Radiocarbon ages on handpicked foraminifera from deep-sea cores are revealing that areas of rapid sediment accumulation are in some cases subject to hiatuses, reworking and perhaps secondary calcite deposition. We present here an extreme example of the impacts of such disturbances. The message is th...

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Bibliographic Details
Published in:Radiocarbon
Main Authors: Broecker, Wallace S, Trumbore, Susan, Bonani, Georges, Wölfli, Willy, Klas, Millie
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1989
Subjects:
General Earth and Planetary Sciences
Archeology
Planktonic foraminifera
Online Access:http://dx.doi.org/10.1017/s0033822200044817
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200044817
Description
Summary:Radiocarbon ages on handpicked foraminifera from deep-sea cores are revealing that areas of rapid sediment accumulation are in some cases subject to hiatuses, reworking and perhaps secondary calcite deposition. We present here an extreme example of the impacts of such disturbances. The message is that if precise chronologies or meaningful benthic planktic age differences are to be obtained, then it is essential to document the reliability of radiocarbon ages by making both comparisons between coexisting species of planktonic foraminifera and detailed down-core sequences of measurements.

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