Hyblean Volcanic Plateau.
Upper mantle and lower crust xenoliths (harzburgites, websterites, mafic granulites, clinopyroxenites and anorthosites) in Miocene tuff-breccias diatreme pipe.
Ref.:
S. Tonarini et al. (1996): Eur. J. Mineral., 8, 1153-1173.