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Thielsen volcano

Shield 2799 m / 9183 ft
Oregon, United States, 43.15°N / -122.07°W
Current status: (probably) extinct (0 out of 5) | Reports
Thielsen volcano books
Typical eruption style: unspecified
Thielsen volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

The eroded central plug of Mount Thielsen forms a prominent summit spire known as the "Lightning Rod of the Cascades." The heavily eroded volcano is Potassium-Argon dated about 0.29 million years ago (Sherrod, in Wood and Kienle 1990). Pre-Thielsen shield volcanoes lie to the east and NE and pyroclastic cones to the south and SW.
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Source: Smithsonian / GVP volcano information


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