Fault tectonics of the Tuscan Nappe in the eastern sector of the Apuan Alps (Italy)

We present the geological-structural map of the Tuscan Nappe exposed on the eastern borderof the Apuan Alps metamorphic dome (Tuscany, Italy). The 1:6,500 scaled Main Map covers anarea of about 10 km2. It contains the first detailed overview of the fault tectonics affecting theTuscan Nappe during the exhumation and uplift of the Tuscan Metamorphic Units. Wedocumented a polyphase fault tectonics that initially produced low-angle extensional faultsand later high-angle faults. The latter started within a transtensional tectonic regime thatproduced left-lateral strike-slip faults. Lately a pure extensional tensor, indicating a switch ofthe maximum compression ?1 axis from sub-horizontal to sub-vertical, produced faults witha dominant dip-slip component. In our reconstruction the lateral thickness variationsdocumented in several formations of the Tuscan Nappe