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News Release 10-131
Triggers of Volcanic Eruptions in Oregon's Mount Hood Investigated
Mixing of two types of magma key to understanding volcano
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![Photo showing Mount Hood, Oregon, looking north from the White River Valley.](/news/mmg/media/images/mt_hood1_f.jpg)
A view of Mount Hood, Oregon, looking north from the White River Valley.
Credit: Adam Kent
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![Photomicrograph of lava from Mount Hood.](/news/mmg/media/images/mt_hood2_f.jpg)
Image of lava from Mount Hood; from crystals in the lava, geologists learn about the volcano.
Credit: Adam Kent
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![Plot of weight percent silicon dioxide versus percentage of total for mount hood, mount st. helens.](/news/mmg/media/images/mt_hood3_f.jpg)
Silicon dioxide in volcanic rocks from Mount Hood tells a story of the volcano's history.
Credit: Adam Kent
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