When water, trapped in fractures or pore space in rocks at the surface, freezes, its volume increases by about 9 percent.
(water; trapped; in fractures or pore space in rocks at the surface) (its volume; increases; by about 9 percent; T:When water, trapped in fractures or pore space in rocks at the surface, freezes)
water its volume
trapped increases
in fractures or pore space in rocks at the surface
by about 9 percent T:When water, trapped in fractures or pore space in rocks at the surface, freezes