geosciences Article Reconsidering the Variscan Basement of Southern Tuscany (Inner Northern Apennines) Enrico Capezzuoli 1,* , Amalia Spina 2, Andrea Brogi 3,4 , Domenico Liotta 3,4, Gabriella Bagnoli 5 , Martina Zucchi 3 , Giancarlo Molli 5 and Renzo Regoli 6 1 Dipartimento di Scienze della Terra, Università di Firenze, 50121 Firenze, Italy 2 Dipartimento di Scienze fisiche e della Terra, Università di Perugia, 06123 Perugia, Italy;
[email protected] 3 Dipartimento di Scienze della Terra e Geoambientali, Università di Bari, 70121 Bari, Italy;
[email protected] (A.B.);
[email protected] (D.L.);
[email protected] (M.Z.) 4 CNR-IGG, 56124 Pisa, Italy 5 Dipartimento di Scienze della Terra, Università di Pisa, 56126 Pisa, Italy;
[email protected] (G.B.);
[email protected] (G.M.) 6 Associazione Mineralogica Paleontologica Senese, 53100 Siena, Italy;
[email protected] * Correspondence: enrico.capezzuoli@unifi.it; Tel.: +39-0552757530 Abstract: The Pre-Mesozoic units exposed in the inner Northern Apennines mostly consist of Pennsylvanian-Permian successions unconformably deposited on a continental crust consolidated at the end of the Variscan orogenic cycle (Silurian-Carboniferous). In the inner Northern Apennines, exposures of this continental crust, Cambrian?-Devonian in age, have been described in Northern Citation: Capezzuoli, E.; Spina, A.; Tuscany, Elba Island (Tuscan Archipelago) and, partly, in scattered and isolated outcrops of southern Brogi, A.; Liotta, D.; Bagnoli, G.; Tuscany. This paper reappraises the most significant succession (i.e., Risanguigno Formation) exposed Zucchi, M.; Molli, G.; Regoli, R. in southern Tuscany and considered by most authors as part of the Variscan Basement.