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Dear colleagues we would like to draw your attention to the session in the next meeting of Italian Geological Society and Italian Society of Mineralogy and Petrography, Catania (Italy) 12-14 September 2018 website: http://www.sgicatania2018.it/index.php): P12. The role of shear zones in the tectono-metamorphic evolution of the lithosphere: insights from microfabric to mountain belt structures Proposers: Rodolfo Carosi (Univ. Torino), Eugenio Fazio (Univ. Catania), Salvatore Iaccarino (Univ. Torino), Chiara Montòmoli (Univ. Pisa) Crustal scale shear zones are very important structures, which play a crucial role in the tectono-metamorphic evolution of the lithosphere, since they preferentially accommodate deformation with respect to the surrounding portions. Primary physical and thermal perturbations usually activate ductile shear zones where rock anisotropies, lattice- and shape-preferred orientations (SPO and LPO) of syn-tectonically re-crystallized minerals can drive the evolution of metamorphic processes in both collisional and extensional regimes. "Weaker domains", often due to initial viscosity contrast or other strain softening mechanisms, occur also during the syn-tectonic emplacement of mid-crustal plutons where deformation is concentrated as testified by the development of anastomosing shear zones. Moreover, these kilometer-sized tabular high strain zones have been widely studied in the past decades as they represent also preferential channels for fluid flow, driving metamorphic reactions and/or controlling their kinetics and controlling the ore-deposits formation. Contributions dealing with field mapping, structural analyses spanning from micro-scale to mega-scale, thermobarometrical, thermochronological and geochronological investigations on shear zones are welcomed in this session. Key note: “Multiple reactivation and strain localization along a Proterozoic orogen-scale deformation zone: The Kongsberg-Telemark boundary in southern Norway revisited” by G. Viola, T. Scheiber and B. Bingen The abstract submission deadline is May 21, 2018 Best regards, Rodolfo Carosi Eugenio Fazio Salvatore Iaccarino Chiara Montomoli