Throughout the park iron oxide has colored the sandstone a myriad shades of red, while more natural white or ochre hues have remained in various sections and layers. Water flow from rain, and river has etched through the rock and created deep chasms of twisted and convoluted mass. During storms, large boulders and trees crash down these canyons more rapidly eroding the deepening gorges. Collecting rains on Zion's massive plateaus rage to central gathering points and gush over precipices descending hundreds and sometimes one-thousand feet in awe-inspiring waterfalls, disappearing within minutes of the conclusion of a storm. ..