caldera
kal de ruh
- n a large crater caused by the violent explosion of a volcano that collapses into a depression
- Scientists are carefully measuring the geological activity in the national park because it contains the caldera of an enormous, ancient and still active volcano.
- We who live along Montana's Yellowstone River are downstream from a simmering caldera, a geologic hot spot that has become especially active recently.
- After 9,000 years of inactivity, this Chilean caldera exploded in May, 2008, forcing the evacuation of Chaitn Town and the surrounding regions.