As temperatures fall below freezing, the water begins to solidify from the top down, expanding and exerting tremendous pressure, acting as a wedge to virtually pry rocks apart.
(temperatures; fall; below freezing) (the water; begins; T:As temperatures fall below freezing) (the water; to solidify; from the top down) (the water; exerting; tremendous pressure)
temperatures the water the water the water
fall begins to solidify exerting
below freezing
T:As temperatures fall below freezing
from the top down
tremendous pressure