Doña Juana

Dona Juana

成層火山 · Colombia · 4137m

The Doña Juana complex in Colombia is shown in this September 2017 Planet Labs satellite image monthly mosaic (N is at the top; this image is approximately 8 km across). The summit area is shaped by a large scarp that has been infilled by lava domes, which have subsequently undergone collapse events to produce block-and-ash flow deposits. · 写真: Satellite image courtesy of Planet Labs Inc., 2017 (https://www.planet.com/). · Wikimedia Commons

タイプ: 成層火山
国: Colombia
地域: South America Volcanic Regions / Northern Andean Volcanic Arc
標高: 4137m
座標: 1.500, -76.936
最終噴火: 1906年
テクトニクス環境: Subduction zone / Continental crust (> 25 km)
火山地形: Composite
主要岩石: Andesite / Basaltic Andesite

地質学的概要

The forested Doña Juana stratovolcano contains two calderas, breached to the NE and SW. The summit of the andesitic-dacitic volcano is comprised of a series of post-caldera lava domes. The older caldera, open to the NE, formed during the mid-Holocene, accompanied by voluminous pyroclastic flows. The younger caldera contains the active central cone. The only historical activity took place during a long-term eruption from 1897-1906, when growth of a summit lava dome was accompanied by major pyroclastic flows.

Wikipedia の要約

英語版の要約

Doña Juana is a stratovolcano, located within the Doña Juana-Cascabel Volcanic Complex National Natural Park in Nariño, Colombia.

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噴火履歴

概要 (VEI時系列)

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詳細タイムライン

1897年VEI 4観測記録
1897-11-01 ~ 1906
紀元前 2550年 (±150年)VEI 4地質学的推定
BCE 2550 ~ 進行中
Northeastern caldera

外部リンク

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