This old quarry is located along the road 1 km SW of Saint-Florent. We can observe hydrated formed mantle rocks representing oceanic unit which is underlying the Miocene basin more on the east. In this area, there is contact with Tenda massif (part of the continental crust) which is right above the oceanic unit. An example of mantle rock is peridotite and very deformed sediments known as Schistes Lustrés. Schists Lustrés is known as a sedimentary cover of the mantle from the deep sea floor.
The tectonic contact of oceanic units and the Tenda unit is located on the eastern border of Tenda Massif. On a larger scale, the contact is decorated by a typical ophiolitic unit, consisting of serpentinites, metabasites and a metasedimentary cover.
In general from the perspective of regional geology, as it is shown in figure 1, it is possible to conclude that large-scale horizontal motions coupled with subduction rollback, back-arc extension and accretion of allochthonous terranes (Corsica, Sardinia) played a fundamental role during Alpine orogenesis.