And exposed to the elements, the limestone comes under the forces of rain and ice. Rain, of course, turns the rock into mud, and spring and fall freezes (there are about 250 freezes a year here) drive water into small cracks, opening the rock open.
(the limestone; comes; under the forces of rain and ice; T:exposed to the elements) (Rain; turns; the rock)
the limestone Rain
comes turns
under the forces of rain and ice T:exposed to the elements
the rock