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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/5150

    Título
    An experimental approach to the preservation potential of magnetic signatures in anthropogenic fires
    Autor
    Herrejón Lagunilla, ÁngelaAutoridad UBU Orcid
    Carrancho Alonso, ÁngelAutoridad UBU Orcid
    Villalaín Santamaria, Juan JoséAutoridad UBU Orcid
    Mallol, Carolina
    Hernández Gómez, Cristo M.
    Publicado en
    PLoS ONE. 2019, V. 14, n. 8, e0221592.
    Editorial
    Public Library of Science
    Fecha de publicación
    2019-08
    ISSN
    1932-6203
    DOI
    10.1371/journal.pone.0221592
    Resumen
    Archaeomagnetic and rock-magnetic methods are of great value in the identification of archaeological fire, especially in Palaeolithic sites where evidence is usually scarce, ambiguous or poorly preserved. Although taphonomic processes can significantly modify Palaeolithic combustion structures, the extent to which such processes affect the magnetic record remains unknown. Here we report the results of an archaeomagnetic study involving five, two-to-five-year-old experimental combustion structures in open-air and cave settings. Some of these combustion structures involved post-combustion human actions such as trampling and relighting. Our results show pseudo-single domain (PSD) magnetite as the main magnetic carrier. Wood ash layers of combustion structures are the most magnetic facies followed by thermally altered sediments constituting the combustion substrates. A decreasing magnetic concentration pattern in depth was observed as a function of temperature. Positive correlation was found between good-quality directional data and macroscopically well-preserved combustion structures. Partial thermoremanent magnetization (pTRM) was the main magnetization mechanism identified in the combustion substrate facies. These data coupled with partial thermomagnetic curve experiments show the potential of these methods to estimate maximum temperatures of the last combustion event. Relightings show very good directional results, but they cannot be identified because the time between them is not enough to statistically distinguish directional variations of the local Earth´s magnetic field. The substrate sediment of an intensively trampled combustion structure yielded reliable archaeomagnetic directions. The results are discussed in terms of magnetization preservation potential and the effects of taphonomic processes on the archaeomagnetic record.
    Materia
    Magnetismo
    Magnetism
    Paleontología
    Paleontology
    URI
    http://hdl.handle.net/10259/5150
    Versión del editor
    https://doi.org/10.1371/journal.pone.0221592
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    • Artículos PALEOMAG-UBU
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    Nombre:
    Herrejón-po_2019.pdf
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