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Numazawa (volcano)

Coordinates: 38°57′40″N 140°47′17″E / 38.961°N 140.788°E / 38.961; 140.788
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Numazawa
Lake Numazawa
Highest point
Elevation2,740 ft (840 m)
ListingVolcanoes in Japan
Coordinates38°57′40″N 140°47′17″E / 38.961°N 140.788°E / 38.961; 140.788
Geography
Geology
Mountain typeShield volcano
Last eruption3,400 BCE

Numazawa is a caldera and lake in Ōnuma District of Fukushima Prefecture, Japan. The caldera measures 2 km (1.2 mi) across and the lake that occupies it measures 96 m (315 ft) deep. The volcanic caldera was constructed within the older and larger Uwaigusa caldera which is 4.2 to 4.0 million years old.[1] The volcano first erupted 110,000 years before present (BP) produced pyroclastics. At 71,000 BP, the Mukuresawa lava dome formed, and at 45,000 BP, a Plinian eruption occurred. Two additional lava domes developed in 43,000 BP and 20,000 BP. The caldera-forming Plinian eruption eruption occurred at 4,600 BP. A VEI 5 eruption occurred at 3,400 BP.[2]

See also

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References

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  1. ^ Yamamoto, Takahiro (2007). "A rhyolite to dacite sequence of volcanism directly from the heated lower crust: Late Pleistocene to Holocene Numazawa volcano, NE Japan". Journal of Volcanology and Geothermal Research. 167 (1–4): 119–133. doi:10.1016/j.jvolgeores.2007.05.011.
  2. ^ "Numazawa". Global Volcanism Program. Smithsonian Institution.