Freeze thaw/frost shattering: When water gets into cracks in rocks during the day and during the night it freezes (Total volume expansion of 9%) and this widens the rock, eventually causing the rock to shatter.
Salt Crystallisation: This is when saline water enters the pores of the rocks and then evaporates, this leaves the salt crystals behind. This process repeats a lot of times until eventually the crystals become so large that the rock disintegrates.
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