The Miocene of Pianosa Island: key to understanding the opening of the Northern Tyrrhenian back-arc basin (Central Mediterranean)

摘要: The only place where Neogene–Quaternary rocks crop out for the entire Tuscan Archipelago in Northern Tyrrhenian Sea is island of Pianosa. In particular, Miocene deposits record depositional and tectonic evolution region during this time period. These are subdivided into two successions separated by a low-angle unconformity. older, middle Burdigalian succession represents calciturbidite shallow marine system, whereas younger late Tortonian–early Messinian comprises continental alluvial system that evolves upwards lagoonal–marginal environment. Here we present sedimentological, palaeontological petrographical data support new stratigraphic palaeogeographical framework reconstructing opening back-arc basin. early records pre-rift phase followed Burdigalian–Langhian erosional phase. This was period synrift continental-marginal deposition, as recorded succession, terminated an important uplift, probably induced start magmatic activity area.