An HVO geologist gathers samples from a network of collection buckets to evaluate the explosive deposit. Photo taken Friday, April 6, 2018 courtesy of U.S. Geological Survey
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Posted on April 8, 2018.
An HVO geologist gathers samples from a network of collection buckets to evaluate the explosive deposit. Photo taken Friday, April 6, 2018 courtesy of U.S. Geological Survey
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