Although the oceanic crust of the Tethys Ocean has been recycled into the mantle, sections of it remain as ophiolite with peridotite, gabbro, prasinite, serpentinite and pillow lava of Jurassic to Cretaceous age in Liguria, Tuscany, Val d'Aosta and Piemonte. Petrological research indicates that ophiolites in the Alps are metamorphosed, while those in the Apennines are not. The Ragusa Basin in the Iblean Plateau of Sicily had magmatism in the Jurassic, together with the Trapanese Basin, followed by Cretaceous activity in the Syracuse area.