Mojave River Valley Museum
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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