All xenoliths derived from the upper mantle and lower crust occur as ellipsoidal bombs or as loose blocks. within the andesitic pumices,up to 30 cm in diameter.Megacrysts of diopside(less than5cm in size),which may contain euhedral forsterite crystals, occur also as crystal lapilli or as "xenocrysts" in the host rocks. In the third stage,basaltic scoria falls were erupted from the Sannome-gata crater; these also contain small amounts of deep-seated xenoliths.