Dating environmental change using magnetic bacteria in archaeological soils from the upper Thames Valley,UK |
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| Institution: | 1. Archaeometry Branch, English Heritage, Fort Cumberland, Eastney, Portsmouth PO5 9LD, UK;2. Department of Earth Sciences, University College London, Gower Street, London WC1E 6BT, UK;1. Department of Gastroenterology, Cancer Institute Hospital, Koto-ku, Japan;2. Department of Surgical Oncology, University of Tokyo, Bunkyo-ku, Japan;3. Department of General & Gastroenterological Surgery, Osaka Medical College, Takatsuki, Japan;4. Department of Surgery, School of Medicine, Jichi Medical University, Shimotsuke, Japan;5. Division of Surgical Oncology, Department of Surgery, Nagoya University, Japan;6. Department of Radiation Oncology, Cancer Institute Hospital, Koto-ku, Japan;7. Department of Gastroenterological Surgery, Cancer Institute Hospital, Koto-ku, Japan;8. Department of Radiology, Osaka Medical College, Takatsuki, Japan;9. Department of Radiology, Teikyo University, Itabashi-ku, Japan;10. Department of Surgery, Teikyo University, Itabashi-ku, Japan;11. Department of Radiology, School of Medicine, Jichi Medical University, Shimotsuke, Japan;12. Department of Radiology, University of Tokyo, Bunkyo-ku, Japan;13. Department of Radiology, Nagoya University, Japan;14. Japanese Foundation for Cancer Research, Koto-ku, Japan;15. Japan Clinical Cancer Research Organization, Chuo-ku, Japan;1. Department of Earth Sciences, Environment and Resources, University of Naples Federico II, Largo San Marcellino 10, 80138 Napoli, Italy;2. Department of Environment, Territory and Earth Sciences, University of Milano Bicocca, Piazza dell''Ateneo Nuovo 1, 20126 Milano, Italy;3. Italian National Agency for New Technologies, Energy and Sustainable Economic Development – ENEA, Portici Research Centre, Piazzale Enrico Fermi 1, Granatello, 80055 Portici, NA, Italy;4. Department of Civil Engineering, Design, Building, Environment, Second University of Naples, Via Roma 8, 81031 Aversa, CE, Italy;1. Institute of Geophysics, ETH Zurich, Rämistr. 101, CH-8092 Zurich, Switzerland;2. University Fribourg, Av. Europe 20, CH-1700 Fribourg, Switzerland;1. National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., bl.3, 1113 Sofia, Bulgaria;2. National Institute of Archaeology and Museum, Bulgarian Academy of Sciences, Saborna Str. 2, 1000 Sofia, Bulgaria |
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| Abstract: | An archaeomagnetic date has been recovered from an organic rich sediment at the base of an alluviated ditch section found during archaeological excavations near the village of Yarnton, Oxford, UK. The magnetic minerals carrying this remanence include greigite and biogenic magnetite, derived from magnetotactic bacteria, that both indicate the presence of a micro-aerobic environment. It is proposed that the archaeomagnetic date from this material indicates the onset of floodplain conditions at the site due to increased population pressure and intensification of land clearance in the late British Iron Age. |
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