9.4 Frost weathering

Frost weathering is common in areas with cold and wet climates. These kinds of regions include mountain ranges and northern tundras.

Frost weathering is caused by ice. During sunny days, the snow on the mountain or the tundra begins to melt. The water then flows into cracks in the rock. When the temperature once again drops below zero, the water in the crack begins to freeze and to expand. As the ice expands, it stretches and breaks the rock that surrounds its. 

In time, frost weathering can cause landslides, which create formations of fragmented rock on the slopes of the mountain or tundra.


Fragmented rock formations in Lapland.