USGS: Volcano Hazards Program - Newberry Geology and History

USGS: Volcano Hazards Program - Newberry Geology and History

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日期:2025-07-03
USGS Volcano Science Center Newberry geology and history information. ... Post-Mazama Eruption Products from 7,700 years ago About 7,700 years ago, winds blew volcanic ash from the massive eruption that created Crater Lake directly northeast over ......看更多