Sedimentary record and the late - Quaternary tectonics of the &#8220;Livorno-Empoli Fault&#8221; (Northern Tuscany, Italy)
Authors: Sarti Giovanni , Giannico Vito Gerardo , Pittaro Daniele , Porta Lorenzo , Molli Giancarlo 
Published: March 2021

&lt;p&gt;The &amp;#8220;Livorno-Empoli&amp;#8221; fault represents the westernmost segment of one a major transversal structure of the inner Northern Apennines the so-called &amp;#8220;Livorno-Sillaro Line&amp;#8221; a regional structure described in the literature, for a long time (e.g., Ghelardoni, 1967; Bortolotti, 1966; Bernini et al., 1991; Cantini et al., 2001; Pascucci et al., 2007; Rosenbaum, Agostinetti, 2015). In the frame of our ongoing studies,&amp;#160; in this contribution, we will focus on the short term history of this regional fault. A new stratigraphic-sequence frame for the late-Quaternary deposits has been developed by using the different facies associations as defined through a large surface database analysis. Moreover, a correlation has been done between subsoil deposits and the outcropping sediments on the hilly areas (Livorno, Pisa, and Cerbaie hills) surrounding the Arno valley.&lt;/p&gt;&lt;p&gt;Additionally, a morphotectonic analysis of the hydrographic networks and relief distribution has been done the Lidar data (DTM), supplied by the Tuscany Region, at the 2 m and 10 m of resolution. Specifically, the river system is particularly sensitive to deformation processes. The fluvial streams are in fact characterized by low geomorphological inertia and, therefore, by response times of a few hundred thousand years to the tectonic processes ongoing.&lt;/p&gt;&lt;p&gt;As a result of the integrated multidisciplinary analysis, it was possible to highlight the evidence of middle Pleistocene-Holocene tectonics of the &amp;#8220;Livorno-Empoli Fault&amp;#8221; until now neglected by the literature.&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;References&lt;/p&gt;&lt;p&gt;&amp;#160;&lt;/p&gt;&lt;p&gt;Ghelardoni, R.&amp;#160; (1967) Osservazioni sulla tettonica trasversale dell&lt;strong&gt;&amp;#8217;&lt;/strong&gt;Appennino Settentrionale. Bollettino della Societa Geologica Italiana, 84, 1&lt;strong&gt;&amp;#8211;&lt;/strong&gt;14.&lt;/p&gt;&lt;p&gt;Bortolotti V. (1966) &amp;#8211; La tettonica trasversale dell&amp;#8217;Appennino &amp;#8211; La linea Livorno-Sillaro. Bollettino della Societ&amp;#224; Geologica Italiana, Vol.85, pp. 529-540, 3 ff., 1 tav.&lt;/p&gt;&lt;p&gt;Bernini, M., Boccaletti, M., Moratti, G., Papani, G., Sani, F., &amp; Torelli, L. (1991). Episodi compressivi neogenico-quaternari nell&lt;strong&gt;&amp;#8217;&lt;/strong&gt;area estensionale tirrenica. Dati in mare e a terra. Memorie della Societ&amp;#224; Geologica Italiana &lt;strong&gt;1990&lt;/strong&gt;, 45, 577&lt;strong&gt;&amp;#8211;&lt;/strong&gt;589.&lt;/p&gt;&lt;p&gt;Cantini P., Testa G., Zanchetta G. &amp; Cavallini R. The Plio-Pleistocenic evolution of extensional tectonics in northern Tuscany, as constrained by new gravimetric data from the Montecarlo Basin (lower Arno Valley, Italy). Tectonophysics, &lt;strong&gt;2001&lt;/strong&gt;,&amp;#160; 330, 25-43.&lt;/p&gt;&lt;p&gt;Pascucci V.; Martini I.P.;&amp;#160; Sagri M.; Sandrelli F. Effects of transverse structural lineaments on the Neogene-Quaternary basins of Tuscany (inner Northern Apennines, Italy). Sedimentary Processes, Environments and Basins: A Tribute to Peter Friend, &lt;strong&gt;2007&lt;/strong&gt;,&lt;/p&gt;&lt;p&gt;Rosenbaum, G.; Agostinetti., N.P. (2015). Crustal and upper mantle responses to lithospheric segmentation in the northern Apennines. Tectonics,&amp;#160; 34, 648&lt;strong&gt;&amp;#8211;&lt;/strong&gt;661, doi:10.1002/2013TC003498.&lt;/p&gt;