A Shakehole or Sinkhole.
Sinkholes form typically as limestone dissolves. A caldera is created by the collapse of volcanic vault ceilings.
A sinkhole is formed when the roof of a cave collapses.
Shakehole or Sinkhole - when the collapse extends to the surface. (Not all cave roof collapses disturb the surface above.)
A large hole formed when a roof of a cave collapses.
Its called a "caldera".
This is called a sinkhole.
A cavern is an underground chamber formed by erosion
A doline or shake-hole - and depending on the nature of both cave and collapse it can create an entrance to the cave.
You run for your life ;)
When rock above a cave collapses, a sinkhole is formed.
Caldera - if the collapse is into a volcanoe's magma chamber. If into a limestone cave its is a shake-hole or sink-hole. (I think that may be a US / UK respectively, name division for the same feature.)
A sinkhole forms.
It is called a cave in.
When a volcano collapses on itself a caldera is then formed.
the fact that a black hole is formed when a star collapses, and a supernova is a star that collapses. the difference is that a black hole is formed when a star collapses completley
stalactite- an icicle-shaped mineral deposit, usu. calcite or aragonite, hanging from the roof of a cavern, formed from the dripping of mineral-rich water. stalagmite- a conical mineral deposit, usu. calcite or aragonite, built up on the floor of a cavern, formed from the dripping of mineral-rich water.
cavern Answer #2: A sinkhole.cavern
it is called a caldera
the roof of the magma chamber collapses forming caldera
Sinkholescavern Answer #2: A sinkhole.cavern