Newberry National Volcanic USGS Fact Sheet Newberry Volcano – Central Oregon’s Sleeping Giant
Hidden in plain sight, Oregon’s massive Newberry Volcano is the largest volcano in the Cascades volcanic arc and covers an area the size of Rhode Island. Unlike familiar cone-shaped Cascades volcanoes, Newberry was built into the shape of a broad shield by repeated eruptions over 400,000 years. About 75,000 years ago a major explosion and collapse event created a large volcanic depression (caldera) at its summit. Newberry last erupted about 1,300 years ago, and present-day hot springs and geologically young lava flows indicate that it could reawaken at any time. Download a copy of the USGS Fact Sheet here.
Newberry National Volcanic Monument Photos
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For more information about Newberry National Volcanic Monument and
the 25th Anniversary Celebrations:
District Ranger at the time leading to and at designation
Dr. Stu Garrett
Chair of Monument Committee leading to designation
Dr. Julie Donnelly Nolan
Long standing USGS Geologist mapping Newberry Volcano