Removing deep snow in layers and removing snow on both sides of a low-pitched roof as you go.
sinkhole
You run for your life ;)
another floor
Shakehole or Sinkhole - when the collapse extends to the surface. (Not all cave roof collapses disturb the surface above.)
Roof raking can help prevent ice dams by removing snow from the roof, which reduces the likelihood of ice dams forming.
A sinkhole is formed when the roof of a cave collapses.
a gable roof is double pitched with vertical ends
a double pitched roof is called a penis. mwahahaha.
the roof of the magma chamber collapses forming caldera
A sinkhole forms.
Its called a "caldera".
A large hole formed when a roof of a cave collapses.