Mount Taishaku

Omanago Group

Kubah lava · Japan · 2341 m

The Omanago volcano group (upper left) consists of a series of five lava domes in Nikko National Park. The highest dome is Omanago, located at the SE end of the complex. Mitsudake is the NW-most dome. The higher northern peak of the Mitsudake complex is out of view to the left, and the lower southern dome forms the low ridge behind the hot spring resort of Yunoko lake in the center of the photo. The peak on the right horizon is Nantaisan. · Foto: Photo by Lee Siebert, 1964 (Smithsonian Institution). · Wikimedia Commons

Tipe: Kubah lava
Negara: Japan
Wilayah: Northwestern Pacific Volcanic Regions / Northeast Japan Volcanic Arc
Ketinggian: 2341 m
Koordinat: 36.807, 139.476
Letusan terakhir: -3050
Kondisi tektonik: Subduction zone / Continental crust (> 25 km)
Bentuk lahan: Cluster
Batuan utama: Dacite

Ringkasan geologi

The Omanago volcano group consists of a series of five closely spaced lava domes that were constructed north and NW of Nantai volcano in Nikko National Park. The highest of the dacitic domes is Omanago, which later erupted andesitic lavas. The Mitsudake dome, which overlooks the hot spring resort of Lake Yunoko, was radiocarbon dated at about 5,000 years ago. Mitsudake was constructed on a southerly dipping slope, so that the southern of its two flat-topped domes is lower, and is overlapped by sediments of the Senjogahara plain.

Riwayat letusan

Ringkasan (VEI dari waktu ke waktu)

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Garis waktu rinci

3050 SMVEI ?Perkiraan geologi
BCE 3050 – Berlangsung
Mitsu-dake

Tautan eksternal

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🔗 Halaman asli Smithsonian GVP

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