It is an avalanche.
Its called a Caldera.
Its called a Caldera
The collapse of the Old Man of the Mountain in 2003.
Crater Lake formed after the collapse of Mount Mazama.
It is an avalanche.
An avalanche can be rock, dirt, or even snow that falls down a mountain slope.Another term is landslide (landslip). A more specific term is rockslide.
Mass Movement
A cone-shaped mountain on the west coast of North America could be Mount St. Helens in Washington state. Its distinctive shape comes from its volcanic history and the eruption in 1980 which caused the top of the mountain to collapse, forming a new crater.
The noun 'collapse' is an abstract noun when it refers to the failure of something abstract (an emotional collapse, the collapse of the Soviet Union).The noun 'collapse' is a concrete noun when it refers to the failure of a physical structure (a mine collapse, a bridge collapse).
China will not collapse. If it did the world would collapse too
The Old Man of the Mountain, a famous granite rock formation in New Hampshire, collapsed on May 3, 2003. The collapse was attributed to natural weathering processes, including freeze-thaw cycles and erosion, which weakened the structure over time. Additionally, the rock's mineral composition made it susceptible to deterioration. Despite attempts to stabilize the formation, the forces of nature ultimately led to its failure.