A caldera is a large depression in a volcano. Most calderas form in one of two ways: by collapse of the top of a composite volcano after the magma chamber is drained.
It forms a 'caldera'.
what happens is that it forms a caldera
It forms a 'caldera'.
calderacalderaIt forms a caldera.
Caldera
CALDERA
A caldera
When a volcanic cone collapses it forms a caldera.
Caldera
a resurgent dome
Caldera
It magma form....