Freeze-thaw action ( frost wedging): water expands 9% in volume as it freezes, water works into rock joints and pores by capillary action and helps pry apart mineral grains.
(it; freezes; ) (water; helps; pry apart mineral grains) (water; works; into rock joints and pores)
it water water
freezes helps works
pry apart mineral grains
into rock joints and pores