“…Either detrital and neoformed minerals in the <2 µm grain-size fraction were investigated in order to determine the maximum burial conditions the fault rocks underwent during thrusting. In particular, mixed layers illite-smectite (I-S) can be used as indicators of the thermal evolution of sedimentary successions (Aldega et al, 2007;2014;Corrado et al, 2010;Izquierdo-Llavall et al, 2013), for evaluating the amount of denudation of the sedimentary and/or tectonic overburden, removed by erosion and/or tectonics (Aldega et al, 2011;Di Paolo et al, 2012, Caricchi et al, 2015Schito et al, 2017) and determining the depth at which deformation occurred in fold-and-thrust belts (Meneghini et al, 2012, Carlini et al, 2013, Carminati et al, 2013.…”