凡例：
Lava flow 15-20 th century
Scoria cone, fall 15-20 th century
Pyroclastic deposit 15-20 th century
Lava flow 2000-800 years ago
Scoria cone, fall 2000-800 years ago
Lava flow, pyroclastic deposit (undifferentiated)
Lava flow, about 3000 years ago
Caldera-forming stage
Main stratovolcano pre-caldera stage
Caldera rim and crater rim
Source fissure