Jerry Magloughlin, a professor in the Geosciences Department at Colorado State University, said it was common to mine cinder cones for such uses. But the volcano near McCoy is unusual for the region, he said.
linkJerry Magloughlin, a professor in the Geosciences Department at Colorado State University, said it was common to mine cinder cones for such uses. But the volcano near McCoy is unusual for the region, he said.
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