Parco Naturale Regionale del Beigua

A nice example of transgression referring to the passage lower Oligocene-middle Oligocene (around 28 millions years) can be found in Maddalena-Ponte Prina site; its earliest marine sediments are generally made up of coral bio constructions lying down directly on the serpentinites of the substratum clearly shaped by the sea action. Silicoclastic coarse deposits subsequently suffocated these bio constructions. The subsequent levels represent a phase of gradual deepening as evidenced by both the coral fauna and the macroforaminifers and molluscs.