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User:Guanlongwucaii/Mount Hakone

Coordinates: 35°13′48″N 139°01′26″E / 35.230°N 139.024°E / 35.230; 139.024
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Hakone
Lake Ashi, within the caldera.
Highest point
Elevation1,438 metres (4,718 ft)
Coordinates35°13′48″N 139°01′26″E / 35.230°N 139.024°E / 35.230; 139.024[1]
Geography
Map
LocationHakone, Kanagawa, Honshu
Geology
Mountain typeComplex calderas
Last eruption1170 ± 100[2]

Mount Hakone is a complex volcano that is truncated by two overlapping calderas, the largest of which is 10 × 11 km wide. The calderas were formed as a result of two major explosive eruptions about 180,000 and 49,000–60,000 years ago. Lake Ashi lies between the southwestern caldera wall and a half dozen post-caldera lava domes that arose along a southwest–northeastern trend cutting through the center of the calderas. Dome growth occurred progressively to the south, and the largest and youngest of them, Kami-yama, forms the high point of Hakone. The calderas are breached to the east by the Haya-kawa canyon. Mount Ashigara is a parasitic cone.[1]

The latest magmatic eruptive activity at Hakone occured 2,900 years ago. It produced a pyroclastic flow and a lava dome in the explosion crater, although phreatic eruptions took place as recently as the 12–13th centuries AD.[3]

Notes

[edit]
  1. ^ a b "Hakone". Global Volcanism Program. Smithsonian Institution.
  2. ^ "Hakone (Eruptive History)". Global Volcanism Program. Smithsonian Institution. Retrieved 2009-6-11. {{cite web}}: Check date values in: |accessdate= (help)
  3. ^ "Hakone (Eruptive History)". Global Volcanism Program. Smithsonian Institution. Retrieved 2009-6-11. {{cite web}}: Check date values in: |accessdate= (help)

Category:Volcanoes of Kanagawa Prefecture