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セロ・ブランコ

Blanco, Cerro

カルデラ · Argentina · 4670m

The circular light-colored area in the center of this Thematic Mapper image is the 6-km-wide Robledo caldera. The Cerro Blanco del Robledo rhyolitic lava dome on the southern rim of the caldera was extruded into a pumice cone (pale tones). The margins of pyroclastic flows erupted prior to extrusion of the lava dome are faintly visible on the caldera floor and on the NW flanks of the caldera. Satellite geodetic surveys in the central Andes showed subsidence of Robledo caldera in the 1990s.
The circular light-colored area in the center of this Thematic Mapper image is the 6-km-wide Robledo caldera. The Cerro Blanco del Robledo rhyolitic lava dome on the southern rim of the caldera was extruded into a pumice cone (pale tones). The margins of pyroclastic flows erupted prior to extrusion of the lava dome are faintly visible on the caldera floor and on the NW flanks of the caldera. Satellite geodetic surveys in the central Andes showed subsidence of Robledo caldera in the 1990s. · 写真: Thematic Mapper image (de Silva and Francis, 1991; courtesy of Matthew Pritchard, California Institute of Technology). · Wikimedia Commons
タイプ
カルデラ
国
Argentina
地域
South America Volcanic Regions / Central Andean Volcanic Arc
標高
4670m
座標
-26.766, -67.746
最終噴火
-2300年
テクトニクス環境
Subduction zone / Continental crust (> 25 km)
火山地形
Caldera
主要岩石
Rhyolite
地質学的概要

The Cerro Blanco volcanic complex contains the 5-km-diameter Cerro Blanco (or Robledo) caldera in NW Argentina, 80 km SW of the Cerro Galán caldera. Cerro Blanco was the site of the largest known Holocene eruption in the Central Andes about 4,200 years BP (Fernandez-Turiel et al., 2013). The rhyolitic Plinian eruption produced ashfall over about 110 km3 and widespread ignimbrite deposits. The large Cerro Blanco del Robledo lava dome overgrew the SW rim of the caldera and is surrounded by extensive rhyolitic pumice-fall deposits. Satellite geodetic surveys in the central Andes (Pritchard and Simons, 2002) showed subsidence of the caldera in the 1990s.

Wikipedia の要約

英語版の要約

Cerro Blanco is a caldera in the Andes of the Catamarca Province in Argentina. Part of the Central Volcanic Zone of the Andes, it is a volcano collapse structure located at an altitude of 4,670 metres (15,320 ft) in a depression. The caldera is associated with a less well-defined caldera to the south and several lava domes.

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噴火履歴

概要 (VEI時系列)
バーをクリックすると個別の噴火が表示されます
2300 BCE~2300 BCE · 1件 · 最大 VEI 72300 BCE2300 BCE2299 BCE2299 BCE2299 BCE

詳細タイムライン

  1. 紀元前 2300年 (±160年)VEI 7地質学的推定
    BCE 2300 ~ 進行中

外部リンク

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