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Slideshow
Hole in the Wall
Nearly 18 million years ago, a volcanic eruption blasted
outward from the nearby mountains. Propelled by the force of
rapidly rising and expanding gasses, a ground-hugging cloud of
ash and rock fragments spread out at near super-sonic speeds
across the countryside.
Hot, suffocating ash buried every living thing in the path of the blast.
The toasted and fossilized remains of birds, mammals, and plants are
now entombed beneath the volcanic tuff forming the colorful cliffs of
Hole-in-the-Wall.
>> Hole in the Wall Geology
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