Geophysical characterization of the El Cervunal kame complex (Sierra de Gredos, Iberian Central System): Insight of infill geometry and reconstruction of former glacial formations

Geological and geophysical studies in complex valley troughs provide a key record for the reconstruction of paleoenvironmental conditions during Quaternary. Here we present study sedimentary infill El Cervunal kame or trough (Sierra de Gredos, Iberian Central System) by means combined interpretation near-surface techniques supported geomorphological borehole data. A set 1D 2D methods, including electrical (Vertical Electrical Sounding Resistivity Tomography), seismic (2D Seismic Tomography Refraction Microtremor) Magnetic Resonance techniques, were used to test their applicability providing better insight on nature geometry. Because greater sensitivity higher resolution coverage achieved with resistivity has proven be most informative physical parameter, while magnetic resonance methods complementary. The was classified into three units five sub-units geological interpretation. Unit 1 consists postglacial sequence includes alluvial-plain alluvial-fan deposits. Units 2 3 below unit interpreted as glacial sequences (glacigenetic fluvio-glacial) morainic deposits, respectively. Subsoil information data enabled partial map-view geometry bodies at trough. results suggest evolution area where erosive-sedimentary processes dominate, but also structural factors should considered. At least well-differentiated stages can established explain occurrence infill: pre-glacial, maximum extension, obturation, retreat periglacial-postglacial.