Geophysical Investigations in the Old Panama Archaeological Site

The results of geophysical prospections in an archaeological site of hispanic type in Panama (Central America) are presented in this article. The archaeological site of Old Panama has been intensively investigated with the objective to know the space – time organization of man in the past. A magnetic prospection was developed in the central sector of the site; the rank of magnitude of the magnetic anomalies allowed the identification of certain characteristics of hispanic type and in addition, the presence of metallic devices, typical of more recent occupation times. On the other hand, the results of three electrical tomographies are presented. From these results it was possible to identify the depth of the metallic objects detected by magnetic prospection.The results of geophysical prospections in an archaeological site of hispanic type in Panama (Central America) are presented in this article. The archaeological site of Old Panama has been intensively investigated with the objective to know the space – time organization of man in the past. A magnetic prospection was developed in the central sector of the site; the rank of magnitude of the magnetic anomalies allowed the identification of certain characteristics of hispanic type and in addition, the presence of metallic devices, typical of more recent occupation times. On the other hand, the results of three electrical tomographies are presented. From these results it was possible to identify the depth of the metallic objects detected by magnetic prospection

Laser-doppler Acoustic Probing of Granular Media with Varying Water Levels

International audienceLaboratory physical modelling and non-contacting ultrasonic techniques are frequently proposed to tackle theoretical and method- ological issues related to geophysical prospecting. We used an innovative experimental set-up to perform laser-Doppler acoustic probing of granular materials with varying water levels to target near-surface hydrogeological applications. The preliminary results presented here show a clear influence of the water level on both first arrival times and dispersion of guided waves, and significant differences in terms of amplitudes. They validate the use of such approach to benchmark recently developed methods for water saturation detection in hydrogeophysics

Geophysical study to characterize input karst water circulation in the saulges cave (Mayenne, France)

Introduction The landscape around the Saulges caves is a limestone plateau cut by the valley of the river Erve. Some of the caves in the sides of this valley contain prehistoric art (Pigeaud, 2004; Pigeaud et al., 2006) and should therefore be protected from water trickling down the walls. This study is part of a program: “Occupations paléolithiques de la vallée de l’Erve” conducted by UMR 6566 for CNRS “CReAAH”, coordinated by Jean-Laurent Monnier. Geophysics could be useful in finding new c..

Three-dimensional structure of a highly heterogeneous soil horizon derived by Electrical Resistivity Tomography

Introduction The soil consists in a natural filter of water transfer to the groundwater. Its structure influences water storage and transfer properties or gas diffusivity, which induce major consequences on both environment and agronomy. Knowing the soil structure is thus essential to predict the soil hydraulic functioning and the 3D characterization of the structure at the horizon scale is necessary to describe the hydraulic functioning of the soil. In heterogeneous horizons, the structure (..

The dark side of the moon: explorar la vessant nord de Collserola

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