Electrical Resistivity Tomography was carried out in Vincennes Park, near Paris (France), above a former underground limestone quarry. One electric profile was placed on a well-surveyed zone of the quarry, and another on a reference zone thought as unexploited. On the former, a previously reported underground cavity (at 10 m depth) was found in our results. But in addition, a new larger cavity was identified on the reference section, illustrating the relevance of ERT for locating shallow cavities. In this paper, we illustrate the application of ERT and the difficulties in data interpretation in a case where the geometry of the cavity is relatively simple and well known, at least in part: the abandoned limestone quarry located under the Vincennes Park, near Paris.
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