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Long Island

Gunung api kompleks · Papua New Guinea · 1263 m

The broad profile of Long Island, seen here from the E, is composed of two steep-sided edifices, Mount Reaumur to the north (center) and Cerisy Peak to the south. Collapse of the volcanic complex during at least three major explosive eruptions about 16,000, 4,000, and 300 years ago produced a large 10 x 12.5 km caldera, whose low rim appears at the right.
The broad profile of Long Island, seen here from the E, is composed of two steep-sided edifices, Mount Reaumur to the north (center) and Cerisy Peak to the south. Collapse of the volcanic complex during at least three major explosive eruptions about 16,000, 4,000, and 300 years ago produced a large 10 x 12.5 km caldera, whose low rim appears at the right. · Foto: Photo by Russel Blong, 1976 (Macquarie University). · Wikimedia Commons
Tipe
Gunung api kompleks
Negara
Papua New Guinea
Wilayah
Southwestern Pacific Volcanic Regions / Bismarck Volcanic Arc
Ketinggian
1263 m
Koordinat
-5.314, 147.105
Letusan terakhir
1993
Kondisi tektonik
Subduction zone / Continental crust (> 25 km)
Bentuk lahan
Composite
Batuan utama
Andesite / Basaltic Andesite
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 Inggris

Long 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

Ringkasan (VEI dari waktu ke waktu)
Klik pada bar untuk melihat letusan individu
2040 BCE~1848 BCE · 1 letusan · VEI maks. 61609~1801 · 1 letusan · VEI maks. 61801~1993 · 10 letusan · VEI maks. 32040 BCE1080 BCE120 BCE8411801

Garis waktu rinci

  1. 1993VEI 1Teramati
    1993-11-03 – 1993-11-25
    E-W fissure NNE of Motmot Island
  2. 1976VEI 1Teramati
    1976-01-02 – Berlangsung
    Motmot
  3. 1973VEI 2Teramati
    1973-04-16 – 1974-02-28
    Motmot
  4. 1968VEI 2Teramati
    1968-03-16 – 1968-06-12
    Motmot
  5. 1961VEI ?Perkiraan geologi
    1961-07-02 – Berlangsung
    Motmot
  6. 1955VEI 3Teramati
    1955-06-05 – 1955-06-13
    Motmot
  7. 1953VEI 3Teramati
    1953-05-08 – 1954-01-07
    Motmot
  8. 1943VEI ?Teramati
    1943 – Berlangsung
    Motmot
  9. 1938VEI ?Teramati
    1938 – Berlangsung
    Lake Wisdom
  10. 1933VEI ?Teramati
    1933 – Berlangsung
    Lake Wisdom
  11. 1660 (±20 tahun)VEI 6Perkiraan geologi
    1660 – Berlangsung
  12. 2040 SM (±110 tahun)VEI 6Perkiraan geologi
    BCE 2040 – Berlangsung

Tautan eksternal

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