Continental and oceanic units of the Northern Apennine and Corsica: insights in the tectono-sedimentary evolution of the Western Tethys during Jurassic-Cretaceous times.
Dipartimento di Scienze della Terra, Università di Pisa, Italy
The oceanic and continental units cropping out in the northwestern side of Northern Apennine and in Alpine Corsica provide useful elements for the reconstruction of the tectono-sedimentary evolution of the Western Tethys during the Jurassic -Cretaceous time span. The architecture of the oceanic basin developed in the Jurassic time between Adria and Europe continental margins can be deduced by analyses of the successions from Ligurian and Schistes Lustrès units. According to available data, the architecture of the oceanic basin was characterized by a strong asymmetry in the continental margins configuration. This asymmetry played a fundamental role in the following convergence phase, developed from Late Cretaceous onward by a subduction event. The characteristics of the subduction (oblique or normal convergence, location and dipping of the subduction plane and subduction rate) can be investigated by the features detected in the oceanic units from Northern Apennine and Corsica.