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Atomic and Laser Physics
Credit: Jack Hobhouse

Prof Christopher Ramsey

Professor of Archaeological Science

Research theme

  • Accelerator physics
  • Climate physics
  • Instrumentation

Sub department

  • Atomic and Laser Physics
christopher.ramsey@physics.ox.ac.uk
Telephone: 01865285215
School of Archaeology
  • About
  • Publications

Highly Variable Freshwater Reservoir Offsets Found along the Upper Lena Watershed, Cis-Baikal, Southeast Siberia

Radiocarbon Cambridge University Press (CUP) 57:4 (2015) 581-593

Authors:

Rick J Schulting, Christopher Bronk Ramsey, Vladimir I Bazaliiskii, Andrzej Weber

Abstract:

A program of paired dating of human and faunal remains on a sample of 11 prehistoric (Mesolithic/Neolithic to Early Bronze Age) graves in the Upper Lena basin, southeast Siberia, was initiated to investigate the freshwater reservoir effect (FRE). The results show the presence of a substantial but highly variable offset, ranging from 255 to 101014C yr. In contrast to previous studies centered on Lake Baikal and the Angara River, human stable nitrogen isotope values show little or no correlation with the radiocarbon offset, despite the clear trophic differences seen in δ15N between terrestrial and aquatic sources of protein in the region's isotope ecology. However, stable carbon isotope measurements show a moderate negative correlation of some predictive value (r= −0.70,p= 0.016,df= 10). Two different regression equations have been calculated, the first using human δ13C values for the entire data set (r2= 0.49) and the second, using both δ13C and δ15N values, limited to the Early Bronze Age of the southern Upper Lena (r2= 0.84,p= 0.030,df= 5). The source of the old carbon in the Upper Lena River system is not clear. While the river flows over carbonate bedrock and is moderately alkaline, we suggest that old terrestrial carbon entering the riverine foodweb through bank erosion and other processes is a more likely candidate for the majority of the14C offset.
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Radiocarbon Dating and the Exodus Tradition

Chapter in Israel's Exodus in Transdisciplinary Perspective, Springer Nature (2015) 81-89

Authors:

Michael W Dee, Christopher Bronk Ramsey, Thomas FG Higham
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Radiocarbon Dating in Paleoseismology

Chapter in Encyclopedia of Earthquake Engineering, Springer Nature (2015) 2021-2031
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Radiocarbon dates from samples funded by English Heritage between 1993 and 1998

English Heritage, 2015

Authors:

A Bayliss, C Bronk Ramsey, G Cook, G McCormac, P Marshall

Radiocarbon dates from the Oxford AMS system: Archaeometry Datelist 35

Archaeometry 57:1 (2015) 177-216

Authors:

CB Ramsey, TFG Higham, F Brock, Baker., D., Ditchfield., RA Staff
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