Golden Gate Photo - Cascade Volcanoes Geotour
FOURTH STOP - MOUNT THIELSEN

Mount Thielsen

Mount Thielsen

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Mount Thielsen

Volcano Status: Extinct. The summit has been eroded into sharp peaks by glaciation.
Age/Last Eruption: The last eruption is estimated at around 290,000 years ago.
Peak Elevation: 9,182 feet (2,799 meters).
Volcano Type/Deposits: Shield volcano. Composed of basalt to andesite lava.

Print No. A99NW-20-8. 

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