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isola Deception

Deception Island

Caldera · Antarctica · 602 m

Deception Island in Antarctica contains a 7-km-wide caldera flooded by the sea. A narrow passageway named Neptune’s Bellows cuts through the caldera wall to the left. Numerous vents located along the caldera ring fractures around the low, 14-km-wide island have been active during historical time. Maars produced by magma-water interaction occur across the shores of the 190-m-deep Port Foster.
Deception Island in Antarctica contains a 7-km-wide caldera flooded by the sea. A narrow passageway named Neptune’s Bellows cuts through the caldera wall to the left. Numerous vents located along the caldera ring fractures around the low, 14-km-wide island have been active during historical time. Maars produced by magma-water interaction occur across the shores of the 190-m-deep Port Foster. · Foto: Photo by Juan Bastias (published in González-Ferrán, 1995). · Wikimedia Commons
Tipo
Caldera
Paese
Antarctica
Regione
Antarctic-Scotia Volcanic Regions / South Shetlands Volcanic Arc
Altitudine
602 m
Coordinate
-62.957, -60.637
Ultima eruzione
1970
Contesto tettonico
Intraplate / Continental crust (> 25 km)
Forma vulcanica
Caldera
Roccia principale
Basalt / Picro-Basalt
Sintesi geologica

Ring-shaped Deception Island, at the SW end of the South Shetland Islands, NE of Graham Land Peninsula, was constructed along the axis of the Bransfield Rift spreading center. A narrow passageway named Neptunes Bellows provides an entrance to a natural harbor within the 8.5 x 10 km caldera that was utilized as an Antarctic whaling station. Numerous vents along ring fractures circling the low 14-km-wide island have been reported active for more than 200 years. Maars line the shores of 190-m-deep Port Foster caldera bay. Among the largest of these maars is 1-km-wide Whalers Bay, at the entrance to the harbor. Eruptions during the past 8,700 years have been dated from ash layers in lake sediments on the Antarctic Peninsula and neighboring islands.

Sintesi da Wikipedia

L'isola Deception è un'isola situata in Antartide, nelle isole Shetland Meridionali. Si trova a 120 km a nord-est della penisola Antartica.

Wikipedia · CC BY-SA · Leggi l'articolo completo →

Storia delle eruzioni

Riepilogo (VEI nel tempo)
Fai clic su una barra per vedere le singole eruzioni
6750 BCE~6459 BCE · 1 eruzioni · VEI max. ?3255 BCE~2964 BCE · 1 eruzioni · VEI max. ?2964 BCE~2673 BCE · 1 eruzioni · VEI max. ?1799 BCE~1508 BCE · 1 eruzioni · VEI max. ?925 BCE~634 BCE · 3 eruzioni · VEI max. ?634 BCE~343 BCE · 1 eruzioni · VEI max. ?343 BCE~52 BCE · 2 eruzioni · VEI max. ?52 BCE~240 · 1 eruzioni · VEI max. ?531~822 · 1 eruzioni · VEI max. ?822~1113 · 1 eruzioni · VEI max. ?1113~1405 · 1 eruzioni · VEI max. ?1405~1696 · 2 eruzioni · VEI max. ?1696~1987 · 11 eruzioni · VEI max. 36750 BCE4711 BCE2381 BCE343 BCE1696

Cronologia dettagliata

  1. 1987VEI ?Stima geologica
    1987-07-23 – In corso
  2. 1972VEI ?Stima geologica
    1972-09-29 – 1972-09-29
  3. 1970VEI 3Osservata
    1970-08-12 – In corso
    NE of Telefon Bay
  4. 1969VEI 3Osservata
    1969-02-21 – 1969-03-16
    West side of Mount Pond
  5. 1967VEI 3Osservata
    1967-12-04 – 1967-12-07
    North side (Telefon Bay, Yelcho I)
  6. 1912 (±5 anni)VEI 3Osservata
    1912 – In corso
    SW part of island
  7. 1871 (±40 anni)VEI ?Stima geologica
    1871 – In corso
    SE side of caldera bay (Kroner Lake)
  8. 1842VEI 2Osservata
    1842-02 – In corso
    S caldera rim (flanks of Mt Kirkwood)
  9. 1839VEI ?Stima geologica
    1839 – In corso
    Crater Lake, Mt. Kirkwood area
  10. 1827 (±2 anni)VEI ?Osservata
    1827 – In corso
    NE side caldera bay (Pendulum Cove)
  11. 1800VEI ?Osservata
    1800 – In corso
    N side caldera bay (near Telefon Bay)
  12. 1641 (±3 anni)VEI ?Stima geologica
    1641 – In corso
  13. 1500VEI ?Stima geologica
    1500 – In corso
  14. 1200VEI ?Stima geologica
    1200 – In corso
  15. 900VEI ?Stima geologica
    900 – In corso
  16. 600VEI ?Stima geologica
    600 – In corso
  17. 100VEI ?Stima geologica
    100 – In corso
  18. 100 a.C.VEI ?Stima geologica
    BCE 100 – In corso
  19. 250 a.C.VEI ?Stima geologica
    BCE 250 – In corso
  20. 550 a.C.VEI ?Stima geologica
    BCE 550 – In corso
  21. 700 a.C.VEI ?Stima geologica
    BCE 700 – In corso
  22. 750 a.C.VEI ?Stima geologica
    BCE 750 – In corso
  23. 800 a.C.VEI ?Stima geologica
    BCE 800 – In corso
  24. 1550 a.C.VEI ?Stima geologica
    BCE 1550 – In corso
  25. 2750 a.C.VEI ?Stima geologica
    BCE 2750 – In corso
  26. 3250 a.C.VEI ?Stima geologica
    BCE 3250 – In corso
  27. 6750 a.C.VEI ?Stima geologica
    BCE 6750 – In corso

Link esterni

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