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Eruptions began about 38 million years ago, and extended over a twelve-million-year period.
en.wikipedia.org He reported that he saw a water and steam ejection, like a giant geyser, followed by an eruption of black smoke.
en.wikipedia.org The volcanic pipes formed by the violent, supersonic eruption of deep-origin volcanoes.
en.wikipedia.org Given the age of the field, other eruptions may have occurred in the recent past.
en.wikipedia.org And, while the past few years have been good for acorns and beechnuts, the forecast is not good for the population eruption to continue.
www.mnn.com