Sinkholes form typically as limestone dissolves. A caldera is created by the collapse of volcanic vault ceilings.
A Shakehole or Sinkhole.
sinkhole
A sinkhole is formed when the roof of a cave collapses.
A large hole formed when a roof of a cave collapses.
A large hole formed when a roof of a cave collapses.
A sinkhole forms.
Its called a "caldera".
Shakehole or Sinkhole - when the collapse extends to the surface. (Not all cave roof collapses disturb the surface above.)
A doline or shake-hole - and depending on the nature of both cave and collapse it can create an entrance to the cave.
A cavern is an underground chamber formed by erosion
You run for your life ;)
Caldera