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Web End = Surv Geophys (2015) 36:831850 DOI 10.1007/s10712-015-9341-3
Federico Cella1 Maurizio Fedi2
Received: 22 April 2015 / Accepted: 14 September 2015 / Published online: 13 October 2015 Springer Science+Business Media Dordrecht 2015
Abstract Magnetic and electromagnetic surveying are effective techniques frequently used in archaeology because the susceptibility and the electric resistivity contrast between the cover soil and several buried nds often lead to detectable anomalies. Signicant advances were recently achieved by 3D imaging methods of potential eld data that provide an estimate of the magnetization distribution within the subsurface. They provide a high-resolution image of the source distribution, thanks to the differentiation of the eld and to the stability of the process. These techniques are fast and quite effective in the case of a compact, isolated, and depth-limited source, i.e., just the kind of source generally occurring in archaeological investigations. We illustrate the high-resolution imaging process for a geophysical study carried out at Torre Galli (Vibo Valentia, Calabria, Italy), one of the most signicant sites of the early Iron Age in Italy. Multi-scale derivative analysis of magnetic data revealed the trends of anomalies shaped and aligned with a regular geometry. This allowed us to make an outline of the buried structures, and then to characterize them in terms of size, shape, and depth by means of the imaging technique. Targeted excavations were therefore addressed to the locations selected by our analysis, revealing structures showing exactly the predicted features and conrming the archaeological hypothesis concerning the settlement organization partitioned in terms of functional differentiation: an intermediate area occupied mostly by defensive structures placed between the village, westward, and the necropolis, eastward.
Keywords Archaeogeophysics 3D imaging Multi-scale analysis Iron Age
communities Magnetic methods EM methods Calabria, Italy
& Federico Cella [email protected]
1 Dipartimento di Biologia, Ecologia e Scienze della Terra, Universit della Calabria, Corso Bucci,87036 Rende, CS, Italy
2 Dipartimento di Scienze della Terra, dellAmbiente e delle Risorse, Universit degli Studi Federico II di Napoli, Largo S. Marcellino, 10, 80100 Naples, Italy
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Web End = High-Resolution Geophysical 3D Imagingfor Archaeology by Magnetic and EM data: The...