Stop 15 at Barringer

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The photo on the left is of another old shaft that was used for drilling in the early 1900's. It is easily recognizable by the surrounding light-colored material that was excavated from the shaft. This is actually a great place to collect pieces of highly shocked Coconino sandstone. These pieces shown in the photo on the right resemble volcanic pumice, but are so light that they float in water! The Coconino sandstone is normally a dark dense rock, but not here. The reason why they are so light is due to the air spaces or bubbles formed in the rock when it was compressed by the impact's shock wave and then uncompressed.

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