Antarktika · Kaldera
Deception Island
- Tipe
- Kaldera
- Ketinggian
- 602 m
- Letusan terakhir
- 1970
- Tipe
- Kaldera
- Negara
- Antarktika
- Wilayah
- Antarktika & Scotia / South Shetlands Volcanic Arc
- Ketinggian
- 602 m
- Koordinat
- -62.957, -60.637
- Letusan terakhir
- 1970
- Kondisi tektonik
- Intralempeng / Kerak benua (> 25 km)
- Bentuk lahan
- Kaldera
- Batuan utama
- Basal / Pikrobasal
Ringkasan geologi
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.
Ringkasan Wikipedia
Ringkasan InggrisDeception Island is in the South Shetland Islands close to the Antarctic Peninsula with a large and usually "safe" natural harbour, which is occasionally affected by the underlying active volcano. This island is the caldera of an active volcano, which seriously damaged local scientific stations in 1967 and 1969. The island previously held a whaling station. It has now become a tourist destination, attracting over 15,000 visitors annually. Two research stations are operated by Argentina and Spain during the summer season. While various countries have asserted sovereignty, it is still administered under the Antarctic Treaty System, meaning it is under no control.
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Riwayat letusan
27 tercatatGlosariumGaris waktu rinci
- 1987VEI ?Metode tidak dinyatakan1987-07-23 – akhir tidak diketahui
- 1972VEI ?Metode tidak dinyatakan1972-09-29 – 1972-09-29
- 1970VEI 3Teramati1970-08-12 – akhir tidak diketahuiNE of Telefon Bay
- 1969VEI 3Teramati1969-02-21 – 1969-03-16West side of Mount Pond
- 1967VEI 3Teramati1967-12-04 – 1967-12-07North side (Telefon Bay, Yelcho I)
- 1912 (±5 tahun)VEI 3Teramati1912-07-02 – akhir tidak diketahuiSW part of island
- 1871 (±40 tahun)VEI ?Perkiraan geologi1871-07-02 – akhir tidak diketahuiSE side of caldera bay (Kroner Lake)
- 1842VEI 2Teramati1842-02-16 – akhir tidak diketahuiS caldera rim (flanks of Mt Kirkwood)
- 1839VEI ?Metode tidak dinyatakan1839-07-02 – akhir tidak diketahuiCrater Lake, Mt. Kirkwood area
- 1827 (±2 tahun)VEI ?Teramati1827-07-02 – akhir tidak diketahuiNE side caldera bay (Pendulum Cove)
- 1800VEI ?Teramati1800-07-02 – akhir tidak diketahuiN side caldera bay (near Telefon Bay)
- 1641 (±3 tahun)VEI ?Perkiraan geologi1641 – akhir tidak diketahui
- 1500VEI ?Perkiraan geologi1500 – akhir tidak diketahui
- 1200VEI ?Perkiraan geologi1200 – akhir tidak diketahui
- 900VEI ?Perkiraan geologi900 – akhir tidak diketahui
- 600VEI ?Perkiraan geologi600 – akhir tidak diketahui
- 100VEI ?Perkiraan geologi100 – akhir tidak diketahui
- 100 SMVEI ?Perkiraan geologi100 SM – akhir tidak diketahui
- 250 SMVEI ?Perkiraan geologi250 SM – akhir tidak diketahui
- 550 SMVEI ?Perkiraan geologi550 SM – akhir tidak diketahui
- 700 SMVEI ?Perkiraan geologi700 SM – akhir tidak diketahui
- 750 SMVEI ?Perkiraan geologi750 SM – akhir tidak diketahui
- 800 SMVEI ?Perkiraan geologi800 SM – akhir tidak diketahui
- 1550 SMVEI ?Perkiraan geologi1550 SM – akhir tidak diketahui
- 2750 SMVEI ?Perkiraan geologi2750 SM – akhir tidak diketahui
- 3250 SMVEI ?Perkiraan geologi3250 SM – akhir tidak diketahui
- 6750 SMVEI ?Perkiraan geologi6750 SM – akhir tidak diketahui
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