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United States · Shield volcano

Belknap Crater

Belknap

Type
Shield volcano
Elevation
2094m
Last eruption
475
Belknap Crater
Photo: USGS Photo by Lyn Topinka · Public domain · Wikimedia Commons
Type
Shield volcano
Country
United States
Region
North America / High Cascades Volcanic Arc
Elevation
2094m
Coordinates
44.285, -121.842
Last eruption
475
Tectonic setting
Subduction zone / Continental crust (> 25 km)
Landform
Shield
Major rock type
Andesite / Basaltic andesite
Geological summary

The Belknap Crater area near McKenzie Pass in Oregon, north of the Three Sisters volcanoes, was the source of one of the largest concentrations of youthful volcanism in the Cascade Range. The basaltic to basaltic andesite Belknap shield volcano, topped by the Belknap Crater pyroclastic cone and the Little Belknap shield volcano immediately to the east, have produced widespread late Holocene lava flows on all sides, much of which took place between about 3,000 and 1,500 years ago. Eruptions from the NE base of Belknap crater produced lava flows that traveled 15 km W into the McKenzie River valley.

From Wikipedia

Belknap Crater is a shield volcano in the Cascade Range in the U.S. state of Oregon. Located in Linn County, it is associated with lava fields and numerous subfeatures including the Little Belknap and South Belknap volcanic cones. It lies north of McKenzie Pass and forms part of the Mount Washington Wilderness. Belknap is not forested and most of its lava flows are not vegetated, though there is some wildlife in the area around the volcano, as well as a number of tree molds formed by its eruptive activity.

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Eruption history

4 recordedGlossary
Summary (VEI over time)
Click a bar to see individual eruptions · Use arrow keys to move between bars, Enter to open
5050 BCE~4853 BCE · 1 eruptions · max VEI ?1104 BCE~906 BCE · 1 eruptions · max VEI 0709 BCE~512 BCE · 1 eruptions · max VEI 2278~475 · 1 eruptions · max VEI 25050 BCE3669 BCE2287 BCE1104 BCE278

Detailed timeline

  1. 475 (±215 yrs)VEI 2Geological estimate
    475 – end unknown
    Belknap Crater
  2. 685 BCE (±50 yrs)VEI 2Geological estimate
    685 BCE – end unknown
    South Belknap and Twin Craters
  3. 1071 BCE (±241 yrs)VEI 0Geological estimate
    1071 BCE – end unknown
    Little Belknap
  4. 5050 BCEVEI ?Geological estimate
    5050 BCE – end unknown

Nearby volcanoes

External links

⚠ For reference only. Not for emergency response.