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Crater Lake, Oregon, USA
The spectacular 8 x 10 km wide Crater Lake caldera was formed about 6850 years ago when Mount Mazama, a complex of overlapping shield volcanoes and stratovolcanoes, collapsed following a major explosive eruption.
The eruption blanketed a huge area with ash falls and produced pyroclastic flows that swept all sides of the volcano.
The caldera, seen here from its southern rim, is 1200 m deep and filled to half its depth by the intensely blue waters of Crater Lake.
PHOTO SOURCE: Dave Wieprecht 1995 US Geological Survey, courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.
NOTE: The information regarding Volcano on this page is re-published from other sources. No claims are made regarding the accuracy of Volcano information contained here. All suggestions for corrections of any errors about Volcano photos should be addressed to the copyright owner noted below the photo.
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This page was last modified 20-MAY-10
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