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Geology and History

Geology and History for Mount Jefferson

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Geology and history of Mount Jefferson.

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Mount Jefferson in Oregon seen from the east....

Geology and History for Mount Jefferson

Mount Jefferson is a prominent feature of the landscape seen from highways east and west of the Cascades. The volcano has erupted repeatedly for hundreds of thousands of years beginning about 300,000 years ago.
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Cascades Volcano Observatory, Mount Jefferson
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Geology and History for Mount Jefferson

Mount Jefferson is a prominent feature of the landscape seen from highways east and west of the Cascades. The volcano has erupted repeatedly for hundreds of thousands of years beginning about 300,000 years ago.
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