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    Re-evaluating archaeomagnetic dates of the vitrified hillforts of Scotland

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    Publication date
    2020-04
    Author
    Suttie, Neil
    Batt, Catherine M.
    Keyword
    Archaeomagnetism
    Bayesian analysis
    Vitrified hillforts
    Rights
    © 2020 Elsevier. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    A re-analysis of archaeomagnetic data from seven vitrified hillforts in Scotland, sampled in the 1980s, shows excellent agreement with recent radiocarbon dates. In the past thirty years our knowledge of the secular variation of the geomagnetic field has greatly improved, especially in the 1st millennium BC, allowing earlier archaeomagnetic data to be reconsidered. We evaluate the likelihood of the data with respect to a state-of-the-art field geomagnetic model and find close coherence between the observed directions and the model for the closing centuries of the first millennium BC. A new Bayesian method of calibration gives the most likely number of separate events required to produce a series of magnetic directions. We then show that the burning of three of the four oblong forts most likely took place around the same time, and our estimate for the date of this is indistinguishable from recent radiocarbon dates from another fort of similar type.
    URI
    http://hdl.handle.net/10454/17717
    Version
    Accepted manuscript
    Citation
    Suttie N and Batt CM (2020) Re-evaluating archaeomagnetic dates of the vitrified hillforts of Scotland. Journal of Archaeological Science: Reports. 30: 102233.
    Link to publisher’s version
    https://doi.org/10.1016/j.jasrep.2020.102233
    Type
    Article
    Collections
    Life Sciences Publications

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