Subaqueous lava appears domed, lenticular shape, tuff appears stratiform shape, bentonite/illite/montmorillonite/zeolite near crater appears loose conglomeration with volcanic bombs.

• 水下熔岩呈穿隆状、透镜状，凝灰岩为层状，近火山口的膨润土／伊利石岩／蒙脱石岩／沸石岩呈松散团窝状并夹有火山弹；