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Problems in the Extension of the Radiocarbon Calibration Curve (10–13 kyr BP)

Published online by Cambridge University Press:  18 July 2016

Irena Hajdas ,
Susan D. Ivy-Ochs  and
Georges Bonani
Irena Hajdas
Affiliation:
Institut für Teilchenphysik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland Swiss Federal Institute for Environmental Science and Technology (EAWAG) überlandstrasse 133, CH-8600 Dübendorf, Switzerland
Susan D. Ivy-Ochs
Affiliation:
Institut für Teilchenphysik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland Ingenieurgeologie, ETH-Hönggerberg, CH-8093 Zürich, Switzerland
Georges Bonani
Affiliation:
Institut für Teilchenphysik, ETH-Hönggerberg, CH-8093 Zürich, Switzerland
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Abstract

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Radiocarbon dating of varved lake sediments shows that, during the Late Glacial (10–12 kyr bp), the offset between the 14C and the absolute time scales was ca. 1 kyr. Varve counting and accelerator mass spectrometry (AMS) dating were used to build absolute and 14C time scales of sediments from two lakes—Soppensee, Switzerland and Holzmaar, Germany. The resulting chronologies extend back to ca. 12.9 kyr cal bp (12.1 kyr bp) in the case of Soppensee and to ca. 13.8 kyr cal BP (12.6 kyr bp) in the Holzmaar record. They compare well with each other but differ significantly from the 14C-U/Th chronology of corals (Bard et al. 1993; Edwards et al. 1993).

Type
Papers from the Workshop on Pages Chronologies
Information
Radiocarbon , Volume 37 , Issue 1 , 1995 , pp. 75 - 79
Copyright
Copyright © The American Journal of Science 

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