How does ice wedging break ice?

Ice wedging is a process that occurs in cold regions where water seeps into cracks and crevices in rock and then freezes. As the water freezes, it expands, exerting pressure on the surrounding rock. Over time, this pressure can cause the rock to crack and break apart.

The process of ice wedging begins when water seeps into cracks and crevices in rock. Once the water is in place, it can freeze if the temperature drops below freezing. When water freezes, it expands by about 9%. This expansion exerts pressure on the surrounding rock, which can cause it to crack and break apart.

The size of the ice wedge that forms depends on several factors, including the amount of water available, the temperature, and the size of the crack or crevice. In some cases, ice wedges can be several meters in length and width.

Ice wedging is a significant contributor to rock weathering in cold regions. It is involved in breaking down large pieces of rock, which makes it easier for the action of other weathering agents, such as abrasion and frost shattering.