The  “Scaly-Clays Complex”  is the prevailing  rock formation  in the section of the Appennines between Emilia and Tuscany, but many different kinds of alloctonous rocks may be observed there; ophiolites are frequent and, among them, the so-ca/led “Green Rocks”  (gabbros, diabases, serpentinites).  They are chaotically and accidentally embedded in the clastic sedimentary clays; probably  originated  by intensive submarine  volcanic  activity between Corsica and Tuscany, they were fragmented   and moved along the Appennines by orogeny between Cretaceous and Pliocene.