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Broken Top volcano

stratovolcano 663 m / 2,175 ft
Oregon, USA (mainland exept Alaska), 44.08°N / -121.7°W
Current status: (probably) extinct (0 out of 5)
Broken Top volcano books
Typical eruption style: Explosive
Broken Top volcano eruptions: unknown, but probably none during the past 10,000 years
TimeMag. / DepthDistanceLocation
Wed, 14 Jun
Wed, 14 Jun 12:16 UTCM 0.6 / 1.9 km0 km- 22km ESE of Three Rivers, Oregon
Thu, 25 May
Thu, 25 May 23:44 UTCM 1.3 / 3.4 km3 km- 20km ESE of Three Rivers, Oregon
Fri, 19 May
Fri, 19 May 00:47 UTCM 1.0 / 0.9 km1 km- 21km ESE of Three Rivers, Oregon
Broken Top in the Three Sisters Wilderness, Oregon, is, as the name suggests, the heavily eroded top of a probably extinct stratovolcano.

Background:

The earliest products were basaltic lava flows forming a basal shield. Later stage eruptions built a steeper cone of more silica rich lava flows and pyroclastic deposits.

Broken Top Photos:

Broken Top volcano, Oregon (Photo: Richard Arculus)
Broken Top volcano, Oregon (Photo: Richard Arculus)



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