or potentially active, with many exceeding 6000 m in altitude. In addition, the zone features 18 monogenetic volcanoes and about 6 caldera/ignimbrite systems.

Edifice proper

Lastarria is formed by two coalesced edifices, the main cone and the older South Spur (Espolón Sur), which are joined at an altitude of about 5500 m and form a 10 km long ridge. The main cone comprises lava domes,

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