Gunung berapi Amak
Amak
Stratovolkan · United States · 547 m

- Tipe
- Stratovolkan
- Negara
- United States
- Wilayah
- North America Volcanic Regions / Aleutian Ridge Volcanic Arc
- Ketinggian
- 547 m
- Koordinat
- 55.418, -163.147
- Letusan terakhir
- 1796
- Kondisi tektonik
- Subduction zone / Continental crust (> 25 km)
- Bentuk lahan
- Composite
- Batuan utama
- Andesite / Basaltic Andesite
Ringkasan geologi
Amak, the easternmost of the Aleutian Islands, is a small island stratovolcano that lies north of the main Aleutian volcanic front, about 50 km NW of Frosty volcano on the western tip of the Alaska Peninsula. The summit of the small, roughly 1 km3 volcano is only 488 m above sea level. Blocky lava flows with prominent levees were emplaced during historical eruptions from 1700-1710 and in 1796 (Marsh, in Wood and Kienle 1990). The flows radiate from a well-defined central crater and cover much of the central part of the island. Earlier volcanism perhaps 4000-5000 years ago consisted of the emission of thin, platy andesitic lava flows. A flat alluvial plain on the S flank contains a flat-bottomed crater that may be a maar.
Ringkasan Wikipedia
Ringkasan InggrisAmak Volcano is a basaltic andesite stratovolcano in the Aleutian Islands of Alaska, United States, 618 miles (995 km) from Anchorage. It is located on the eponymous island, 31 miles (50 km) from Frosty Volcano and near the edge of the Alaskan Peninsula's western flank. Only boats are allowed to access the island with a certain permit.
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Riwayat letusan
Garis waktu rinci
- 1796VEI ?Teramati1796 – Berlangsung
- 1700VEI ?Teramati1700 – 1710
- 2550 SM (±500 tahun)VEI ?Perkiraan geologiBCE 2550 – Berlangsung
Tautan eksternal
⚠ Untuk referensi saja. Bukan untuk tanggap darurat.