Hachimantai
Stratovulcano · Japan · 1613 m
- Tipo
- Stratovulcano
- Paese
- Japan
- Regione
- Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
- Altitudine
- 1613 m
- Coordinate
- 39.958, 140.854
- Ultima eruzione
- -5350
- Contesto tettonico
- Subduction zone / Continental crust (> 25 km)
- Forma vulcanica
- Composite
- Roccia principale
- Andesite / Basaltic Andesite
Sintesi geologica
Hachimantai was constructed from widely scattered vents during the Pleistocene and is capped with andesitic lavas from vents in the center of the complex. The summit forms an undulating plateau surrounded by steep slopes. Circular craters are located near Komonomore and Mokkodake in the center of the plateau. The craters are youthful looking, but have not been dated. Hayakawa (1996, pers. comm.) considered Hachimantai to be of possible Holocene age. No historical eruptions have been recorded, but active solfataras are found on the western and southern flanks.
Sintesi da Wikipedia
Riassunto in ingleseMount Hachimantai is the highest peak of a group of stratovolcanos distributed around the Hachimantai plateau in the Ōu Mountains in northern Honshū, Japan. This volcanic plateau is part of the Nasu Volcanic Zone and straddles the border between the Iwate Prefecture and Akita Prefecture. The volcano is listed as one of the 100 Famous Japanese Mountains, and forms part of the Towada-Hachimantai National Park.
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Storia delle eruzioni
Cronologia dettagliata
- 5350 a.C.VEI ?Stima geologicaBCE 5350 – In corso
- 7900 a.C. (±150 anni)VEI ?Stima geologicaBCE 7900 – In corso
Link esterni
⚠ Solo a scopo informativo. Non adatto a situazioni di emergenza.