B its of strombolian-type scoria and Hawaii-type effusive lava may accompany lately after Phreatomagmaticerup tion, they constitute a erup tive activity cycle in its entirely.

• 岩浆射汽喷发晚期往往伴随斯通博利式喷发和夏威夷式熔岩流,三者构成一个完整火山活动旋回。