Английская Википедия:Copahue
Шаблон:Short description Шаблон:Infobox mountain
Copahue (Шаблон:IPA-es) is a stratovolcano in the Andes on the border of Bío Bío Region, Chile and Neuquén Province, Argentina. There are nine volcanic craters along a Шаблон:Convert line, the easternmost of which is historically the most active, and contains a 300 m (1000 ft) wide crater lake with a pH ranging between 0.18 and 0.30.[1] Eruptions from this crater lake have ejected pyroclastic rocks and chilled liquid sulfur fragments.[2] Although the lake emptied during the 2000 eruption, it later returned to its previous levels. Copahue means "sulphur waters" in Mapuche.[3]
Copahue sits on a basement of sedimentary and volcanic rocks ranging in age from Eocene to Pliocene.[1] The modern volcano sits in a volcanically active area, with a caldera from the Pliocene, measuring 20 km by 15 km, lying to the east of Copahue. The modern volcano became active roughly 1.2 million years ago (Ma).[1] The modern caldera formed 0.6 to 0.4 Ma, and produced large pyroclastic flows, extending up to 37 km from the volcano.[1]
The modern structure is an elongated shield volcano, with a maximum thickness of 22 km and a minimum of 8 km.[1] It has erupted ten times since 1900, most recently in March 2016.[2][3][4] On 27 May 2013, it was reported that a red alert had been issued and the evacuation of around 2,000 people was to begin.[5]
See also
References
Bibliography
- Шаблон:Cite book (in Spanish; also includes volcanoes of Argentina, Bolivia, and Peru)
- Шаблон:Cite book
External links
Шаблон:Andean volcanoes Шаблон:Authority control
- ↑ 1,0 1,1 1,2 1,3 1,4 Шаблон:Cite journal
- ↑ 2,0 2,1 Ошибка цитирования Неверный тег
<ref>; для сносокgvpне указан текст - ↑ 3,0 3,1 Шаблон:Cite news
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite news
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