Archaeomagnetic secular variation in the UK during the past 4000 years and its application to archaeomagnetic dating

Details Archaeomagnetic secular variation in the UK during the past 4000 years and its application to archaeomagnetic dating Archaeomagnetic secular variation in the UK during the past 4000 years and its application to archaeomagnetic dating

Feb 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pepi..160...97z&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 160, Issue 2, p. 97-107.

Physics

10

Scientific paper

This paper examines the limitations and deficiencies of the current British archaeomagnetic calibration curve and applies several mathematical approaches in an attempt to produce an improved secular variation curve for the UK for use in archaeomagnetic dating. The dataset compiled is the most complete available in the UK, incorporating published results, PhD theses and unpublished laboratory reports. It comprises 620 archaeomagnetic (directional) data and 238 direct observations of the geomagnetic field, and includes all relevant information available about the site, the archaeomagnetic direction and the archaeological age. A thorough examination of the data was performed to assess their quality and reliability. Various techniques were employed in order to use the data to construct a secular variation (SV) record: moving window with averaging and median, as well as Bayesian statistical modelling. The SV reference curve obtained for the past 4000 years is very similar to that from France, most differences occurring during the early medieval period (or Dark Ages). Two examples of dating of archaeological structures, medieval and pre-Roman, are presented based on the new SV curve for the UK and the implications for archaeomagnetic dating are discussed.

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