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Goat Rocks volcano

stratovolcano 2494 m / 8,182 ft
Washington, Canada and USA (mainland), 46.5°N / -121.45°W
Current status: (probably) extinct (0 out of 5) | Reports
Goat Rocks volcano books
Typical eruption style: Explosive
Goat Rocks volcano eruptions: 3 million - ca. 500,000 years ago No recent earthquakes
TimeMag. / DepthDistanceLocation
Goat Rocks is the center a deeply eroded, glaciated volcanic center of a volcanic field 30 km (18 miles) north of Mount Adams, Washnington, USA.

Background:

Volcanism began approximately 3.2 million years ago with eruption of at least 650 meters of high-silica rhyolite tuff, which is exposed on the east flank of the subsequent Goat Rocks volcano.
Goat Ricks volcano itself was probably build between ca 2.5 - 0.5 million years ago. It produced large volume lava flows, most notably the 1.0 million-year-old Tieton Andesite, which reached ca. 80 kilometers eastward. It is the longest known andesite flow on Earth.
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Source: Wood and Kienle, (eds.), 1990, Volcanoes of North America - United States and Canada: Cambridge University Press., cited on CVO website.


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