Some of the land is covered by glaciers, which are large masses of snow and ice that flow under their own weight.
(Some of the land; is covered; by glaciers) (glaciers; are; large masses of snow and ice that flow under their own weight) (large masses of snow and ice; flow; under their own weight)
Some of the land glaciers large masses of snow and ice
is covered are flow
by glaciers
large masses of snow and ice that flow under their own weight
under their own weight