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Exploring integrated geophysics and geotechnics as a paleolandscape reconstruction tool: archaeological prospection of (prehistoric) sites buried deeply below the Scheldt Polders (NW Belgium)
Verhegge, J.; Missiaen, T.; Crombé, P. (2016). Exploring integrated geophysics and geotechnics as a paleolandscape reconstruction tool: archaeological prospection of (prehistoric) sites buried deeply below the Scheldt Polders (NW Belgium). Archaeological Prospection 23(2): 125-145. https://dx.doi.org/10.1002/arp.1533
In: Archaeological Prospection. Wiley-Blackwell: Hoboken. ISSN 1075-2196; e-ISSN 1099-0763, meer
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prehistoric buried landscapes; electromagnetic induction survey;electrical resistivity imaging; shear wave land seismics; conepenetration test; core sampling |
| Abstract |
During extensive construction works in Antwerp harbour, well preserved Late Glacial dune formations were discovered buried deeply below the Scheldt polders and covered by peat, organic matter (OM) rich clays and marine clayey to sandy sediments. First, coring based archaeological prospection strategies for evaluating prehistoric occupation levels in wetland landscapes are reviewed. Next, a more effective approach including near surface geophysical and geotechnical techniques is proposed and tested in Doelpolder Noord. The results indicate that high resolution electromagnetic induction survey at multiple coil spacing provides a suitable approximation of the prehistoric landscape variability but is challenged by variations in groundwater brackishness. Gridded cone penetration tests provide a solution in such cases and serve as an excellent interpretation tool for the conductivity data in general. Due to the required effort, electrical resistance imaging and shear wave land seismics were judged inefficient. Finally, a small dune with indications of paleosol conservation and estimated suitability for Final Palaeolithic to Early Neolithic occupation is sampled by Dutch hand augering and Sonic Drill Aqualock coring. Archaeological indicators for prehistoric occupation such as burnt bone and flint fragments were retrieved from these samples after sieving. |
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