The mountains are the only in Poland example of mountains made up of rocks built of sandstones and marl layers of a very differentiated resistance to erosion caused by the wind and water.
(The mountains; are; ) (mountains; made up; of rocks) (rocks; built; of sandstones and marl layers of a very differentiated resistance to erosion) (erosion; caused; by the wind and water)
The mountains mountains rocks erosion
are made up built caused
of rocks
of sandstones and marl layers of a very differentiated resistance to erosion
by the wind and water