When a volcanic cone collapses it forms a caldera.
When a volcano collapses or erodes, it can form islands. A example of this happening and forming an island is the islands of Hawaii.
The result is extrusive igneous rock.
basalt
caldera
a caldera
CALDERA
Caldera
Caldera
Caldera.
Caldera
CALDERA
Caldera
Caldera
Caldera.
calderacalderaIt forms a caldera.
Caldera
what happens is that it forms a caldera
It forms a 'caldera'.
A caldera
When a volcano collapses on itself a caldera is then formed.
It is a volcanic caldera which is a large, bowl-shaped volcanic depression that forms when the top of a volcanic cone collapses into the space left after magma is ejected during a violent volcanic eruption.
When a volcano collapses a very wide crater is called a caldera.