Geology and Minerals
Billy Mitchell is a dormant pyroclastic shield volcano in central Bougainville, just north-east of the Bagana Volcano in Papua New Guinea. It is a small pyroclastic shield truncated by a 2 km wide caldera filled by a crater lake. It is named after Billy Mitchell, a 20th-century United States Army general who is sometimes regarded as the father of the United States Air Force.
1975 eruption of Mauna Loa.
Geological Institute of the Russian Academy of Sciences.
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