...It is composed of lava flows of tholeiitic olivine basalt, mainly less than a few meters thick. At the summit is a Kilauea-type caldera measuring about 2 km x 3 km, with the active crater Halemaumau in the southwest. Eruptions occur not only at the summit, but also in the rift zones that extend from the summit to the southwest and east and reach the seafloor. *Some of the terminology that mentions "Halemaumau" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…ソレアイト質カンラン石玄武岩のおもに厚さ数m以下の溶岩流よりなる。山頂に約2km×3kmのキラウェア型カルデラがあり,その南西部に活火口ハレマウマウHalemaumauがある。噴火は山頂部のほか,山頂から南西と東に延びて海底に達するリフト帯から起こる。… ※「Halemaumau」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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