Prospections géophysiques dans le lit majeur de la Garonne à l’Isle-Saint-Georges (Gironde) : approche paléogéographique et archéologique.

Abstract : Since 2009 the town of Isle-Saint-Georges (33) is the scene of substantial and uninterrupted archaeological research. These studies mainly concern the Iron Age and the Gallo-Roman period. Surface geophysical tools have been implemented to meet two objectives. On the one hand, an electromagnetic prospecting was carried out on approximately 50 ha to map sedimentary masses present in the first meters of basement. These data coupled with cores presented elsewhere (Lescure & Arnaud-Fassetta, this volume) contribute to palaeo-geographic and palaeo-environmental reconstruction of the sector. In particular, they succeeded in locating two large palaeo-channels bordering north and south the palaeo-island on which developed habitat in antiquity. On the other hand, electrical, magnetic and electromagnetical surveys at a higher spatial resolution (1 to 20 measurements per m²) were performed on an area of approximately 4.5 ha northwest of the agglomeration. They show a dense occupation of the area. The comparison of geophysical data with those from some archaeological surveys helped to identify the source of some anomalies. Several walls, a well, a road of gravel, soils and many earths were able to be located.
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Vivien Mathé, Adrien Camus, Anne Colin. Prospections géophysiques dans le lit majeur de la Garonne à l’Isle-Saint-Georges (Gironde) : approche paléogéographique et archéologique.. Aquitania, Pessac : Fédération Aquitania, 2015, 31, pp.169-192. ⟨hal-01257102⟩

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