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Mount Jefferson in OR seen from the east.

By Volcano Hazards Program October 6, 1984

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

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Mount Jefferson in Oregon seen from the east.

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

November 7, 2023

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

Geology and History for Mount Jefferson

November 7, 2023

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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Science

Items per page

Label

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

November 7, 2023

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.

By

Cascades Volcano Observatory, Mount Jefferson

Geology and History for Mount Jefferson

November 7, 2023

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.

Photographer

Topinka, Lyn

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