Broken Top - Wikipedia
Broken Top is a glacially eroded complex stratovolcano. It lies in the Cascade Volcanic Arc, part of the extensive Cascade Range in the U.S. state of Oregon. Located southeast of the Three Sisters peaks, the volcano, residing within the Three Sisters Wilderness, [ 4 ] is 20 miles (32 km) west of Bend, Oregon in Deschutes County.
Broken Top | U.S. Geological Survey - USGS.gov
2023年11月12日 · Broken Top is a long extinct volcano that was active in the middle Pleistocene between about 300 and 150 ka. In 2001, scientists discovered a broad area of uplift west of South Sister that had been rising a few cm (inches) per year since the 1990s. Uplift rates have varied, with a new pulse starting in 2020–2021.
Eruption History for Broken Top | U.S. Geological Survey - USGS.gov
Broken Top is a long extinct volcano that was active in the middle Pleistocene between about 300 and 150 ka. Eruptive products from Broken Top range from basalt to rhyodacite. Its ancient cone has been deeply eroded leaving isolated peaks with little of its original surface intact.
Broken Top - Global Volcanism Program
Broken Top is a complex dominantly basaltic-andesite stratovolcano immediately SE of South Sister volcano. It is extensively eroded by glaciers, with the summit crater breached to the SE. Intermittent eruptions of andesite, dacite, and rhyolite have produced lava flows, pyroclastic flows, and airfall tephra.
Broken Top Volcano, Bend Oregon - AllTrips
With its distinctively rugged and “broken” peak, Broken Top is one of the most picturesque mountains in Central Oregon. Located within the vast Three Sisters Wilderness Area, Broken Top Mountain is an extinct stratovolcano that has been significantly eroded by glaciers over time.
Broken Top Volcano Earthquakes: Latest Quakes Past 14 Days ...
2024年5月19日 · Broken Top in the Three Sisters Wilderness, Oregon, is, as the name suggests, the heavily eroded top of a probably extinct stratovolcano. View recent quakes. 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 Volcano, Oregon (Canada and USA (mainland))
2024年3月16日 · Broken Top in the Three Sisters Wilderness, Oregon, is, as the name suggests, the heavily eroded top of a probably extinct stratovolcano. [ smaller] [ larger] View recent quakes. 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 Volcano, Oregon, USA | John Seach
Broken Top Volcano | John Seach. Oregon, USA . 44.08 N, 121.70 W summit elevation 2800 m Stratovolcano . Broken Top Volcano is located in the Three Sisters Wilderness. The volcano is eroded by glacial action. Further Reading Grubensky, M.J., …
Broken Top - Steven's Peak-bagging Journey
Broken Top is one of the more rugged volcanoes in the Three Sisters Wilderness of central Oregon. It’s right next to the Three Sisters but still boasts over 600 m prominence. The easiest route is the NW Ridge and requires some exposed scrambling near the summit and some parties may prefer using a rope.
Skiing the Cascade Volcanoes: Broken Top - Ski Mountaineer
2003年1月15日 · Broken Top is the oldest and most eroded of the five major volcanoes in the Three Sisters region. Several hundred-thousand years ago its summit probably topped 10000 ft (3000 m) as do the present summits of the Three Sisters, but glacial erosion has now removed all of the original surface and carved deep into the interior, revealing the ...