In frost wedging, a crack expands when water

freezes
. When the water
melts
it can seep into new fissures in the rock.
correct?

1 answer

Yes, that’s correct! In frost wedging, water infiltrates cracks in rocks. When the temperature drops, the water freezes and expands, exerting pressure on the surrounding rock and causing the crack to widen. When the temperature rises and the ice melts, the water can seep deeper into the newly widened fissures, further loosening the rock and potentially causing additional fragmentation. This process can repeat itself, leading to significant weathering and erosion of the rock over time.