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Radiocarbon Dating of Shells and Foraminifera from the Skagen Core, Denmark: Evidence of Reworking

Published online by Cambridge University Press:  18 July 2016

Susanne Heier-Nielsen ,
Keld Conradsen ,
Jan Heinemeier ,
K. L. Knudsen ,
H. L. Nielsen ,
Niels Rud  and
Á. E. Sveinbjörnsdóttir
Susanne Heier-Nielsen
Affiliation:
Department of Earth Sciences, University of Aarhus, DK-8000 Aarhus C, Denmark AMS 14C Dating Laboratory, Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
Keld Conradsen
Affiliation:
Department of Earth Sciences, University of Aarhus, DK-8000 Aarhus C, Denmark
Jan Heinemeier
Affiliation:
AMS 14C Dating Laboratory, Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
K. L. Knudsen
Affiliation:
Department of Earth Sciences, University of Aarhus, DK-8000 Aarhus C, Denmark
H. L. Nielsen
Affiliation:
AMS 14C Dating Laboratory, Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
Niels Rud
Affiliation:
AMS 14C Dating Laboratory, Institute of Physics and Astronomy, University of Aarhus, DK-8000 Aarhus C, Denmark
Á. E. Sveinbjörnsdóttir
Affiliation:
Science Institute, University of Iceland, Dunhagi 3, IS-107 Reykjavík, Iceland
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Abstract

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We report on 69 radiocarbon dates of mollusk shells and benthic foraminifera from the upper 132 m of the marine shelf sediments of the Skagen Core (220 m total length). The dated sequence covers the Late Glacial and the Holocene (from 15 ka bp to Recent). Sedimentation rates range from 1 to 70 m ka−1. The macrofossil shell dates follow a smooth curve constituting an age model for dating the sediments. The foraminiferal dates fall into two groups: those that agree exactly with the mollusk shells and those that deviate substantially, always being older than the shells by as much as 5 ka. One mixed foraminiferal sample consisted of members from both groups, and as a result, the age deviation of the sample turned out to be some weighted average. The data indicate that the age deviations are due to admixtures of reworked older foraminifera.

Type
I. 14C in the Reconstruction of Past Environments
Information
Radiocarbon , Volume 37 , Issue 2 , 1995 , pp. 119 - 130
Copyright
Copyright © the Department of Geosciences, The University of Arizona 

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