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caldera
A calera is a volcanic feature formed by the collapse of land following a volcanic eruption. They are sometimes confused with volcanic craters. The word comes from Spanish, meaning "bowl". In some texts the English term cauldron is also used.
Trivia about caldera
This crater is formed when a volcano explodes & the cone collapses; Oregon's Crater Lake is an example
The explosion of a volcanic cone followed by the cone's collapse creates this bowl-shaped crater
The broad, craterlike basin of a volcano is referred to by this Spanish term