Volcán Azufral
Azufral
成層火山 · Colombia · 4070m
- タイプ
- 成層火山
- 国
- Colombia
- 地域
- South America Volcanic Regions / Northern Andean Volcanic Arc
- 標高
- 4070m
- 座標
- 1.080, -77.680
- 最終噴火
- -930年
- テクトニクス環境
- Subduction zone / Continental crust (> 25 km)
- 火山地形
- Composite
- 主要岩石
- Dacite
地質学的概要
Azufral stratovolcano in southern Colombia, also known as Azufral de Túquerres, is truncated by a 2.5 x 3 km caldera containing a Holocene rhyodacitic lava-dome complex. A crescent-shaped lake, Laguna Verde, occupies the NW side of the caldera. Nearly a dozen lava domes are present, the latest of which were formed about 3600 years ago and have active fumaroles. Azufral rocks are more silicic than those of nearby Colombian volcanoes; an apron of rhyodacitic pyroclastic-flow deposits rings the volcano. The last known eruption took place about 1000 years ago.
Wikipedia の要約
英語版の要約Azufral is a stratovolcano located in the department of Nariño in southern Colombia, 12 km (7 mi) west of the town of Túquerres. It is the only volcano of the Western Ranges of the Colombian Andes. Its name derives from the Spanish word for sulfur, azufre. The volcano is considered semi-dormant but there are numerous fumaroles in the summit crater. The summit of the volcano has an altitude of 4,070 metres (13,350 ft), and the north-western side of the crater contains a crescent-shaped lake named Laguna Verde at 3,970 m (13,025 ft). The lake is 1,100 m (0.68 mi) long and 600 metres (2,000 ft) wide. and its bright green color is a result of the sulfur and iron-based deposits in the crater. There are also two other much smaller lakes in the crater, Laguna Negra and Laguna Cristal.
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噴火履歴
詳細タイムライン
- 紀元前 930年VEI 4地質学的推定BCE 930 ~ 進行中
- 紀元前 1650年 (±150年)VEI ?地質学的推定BCE 1650 ~ 進行中
- 紀元前 1850年VEI ?地質学的推定BCE 1850 ~ 進行中
- 紀元前 2095年 (±100年)VEI ?地質学的推定BCE 2095 ~ 進行中
外部リンク
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