Papua Nugini · Gunung api kompleks
Long Island
- Tipe
- Gunung api kompleks
- Ketinggian
- 1263 m
- Letusan terakhir
- 1993
- Tipe
- Gunung api kompleks
- Negara
- Papua Nugini
- Wilayah
- Pasifik Barat Daya / Bismarck Volcanic Arc
- Ketinggian
- 1263 m
- Koordinat
- -5.314, 147.105
- Letusan terakhir
- 1993
- Kondisi tektonik
- Zona subduksi / Kerak benua (> 25 km)
- Bentuk lahan
- Komposit
- Batuan utama
- Andesit / Andesit basaltik
Ringkasan geologi
The broad profile of Long Island is dominated by two steep-sided stratovolcanoes, Mount Reaumur in the north and Cerisy Peak in the south. Collapse of the basaltic-andesitic volcanic complex produced a large 10 x 12.5 km caldera, now filled by Lake Wisdom. Caldera formation occurred during at least three major explosive eruptions, about 16,000, 4,000, and 300 years ago. The most recent deposited andesitic tephra across the New Guinea Highlands, prompting legends of a "Time of Darkness." Post-caldera eruptions have constructed a small cone, Motmot Island, in the south-central part of Lake Wisdom. Moderate explosive eruptions have occurred during the 20th century from vents at and near Motmot Island.
Ringkasan Wikipedia
Ringkasan InggrisLong Island is a populated volcanic island in Madang Province, Papua New Guinea. It is located north of the island of New Guinea, separated from it by the Vitiaz Strait. The island's interior contains a 360 m-deep (1,180 ft) freshwater volcanic crater lake and within that lake exists an even smaller island known as Motmot island. During the late 17th or early 18th century virtually all of the biota on the island was destroyed and has subsequently provided scientists a unique opportunity to study recolonization efforts by plants, animals, and humans. The vast majority of the buildings on the island are constructed using vernacular architecture.
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Riwayat letusan
12 tercatatGlosariumGaris waktu rinci
- 1993VEI 1Teramati1993-11-03 – 1993-11-25E-W fissure NNE of Motmot Island
- 1976VEI 1Teramati1976-01-02 – akhir tidak diketahuiMotmot
- 1973VEI 2Teramati1973-04-16 – 1974-02-28Motmot
- 1968VEI 2Teramati1968-03-16 – 1968-06-12Motmot
- 1961VEI ?Metode tidak dinyatakan1961-07-02 – akhir tidak diketahuiMotmot
- 1955VEI 3Teramati1955-06-05 – 1955-06-13Motmot
- 1953VEI 3Teramati1953-05-08 – 1954-01-07Motmot
- 1943VEI ?Teramati1943-07-02 – akhir tidak diketahuiMotmot
- 1938VEI ?Teramati1938-07-02 – akhir tidak diketahuiLake Wisdom
- 1933VEI ?Teramati1933-07-02 – akhir tidak diketahuiLake Wisdom
- 1660 (±20 tahun)VEI 6Perkiraan geologi1660 – akhir tidak diketahui
- 2040 SM (±110 tahun)VEI 6Perkiraan geologi2040 SM – akhir tidak diketahui
Gunung api terdekat
Tautan eksternal
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