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Aconcagua (Spanish pronunciation: [akoŋˈkaɣwa]) is a mountain in the Principal Cordillera [4] of the Andes mountain range, in Mendoza Province, Argentina.It is the highest mountain in the Americas, the highest outside Asia, [5] and the highest in both the Western Hemisphere and the Southern Hemisphere [1] with a summit elevation of 6,961 metres (22,838 ft).
Although Aconcagua, the highest peak in South America and the highest peak in the western hemisphere, does have a volcanic origin, its current high point is due to geological processes rather than being strictly volcanic. [4] Due to this, Aconcagua is not considered to be a volcano on its own, at least not as a member of Volcanic Seven Summits.
Nevado Ojos del Salado is a dormant complex volcano in the Andes on the Argentina–Chile border. It is the highest volcano on Earth and the highest peak in Chile. The upper reaches of Ojos del Salado consist of several overlapping lava domes, lava flows and volcanic craters, with sparse ice cover.
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The Andes range has many active volcanoes distributed in four volcanic zones separated by areas of inactivity. The Andean volcanism is a result of the subduction of the Nazca Plate and Antarctic Plate underneath the South American Plate. The belt is subdivided into four main volcanic zones that are separated from each other by volcanic gaps.
Yet, if you measure a mountain from its base to its peak, then the 33,500-foot (10,211-meter) Mauna Kea, an inactive shield volcano on the island of Hawaii, would instead come out on top.
Mount Kilimanjaro is the largest non-shield volcano in terms of both base area (635 km 2 or 245 sq mi) and volume (4,793 km 3 or 1,150 cu mi). Mount Logan is the largest non-volcanic mountain in base area (311 km 2 or 120 sq mi).
Mount Ruang spewed lava and and ash on April 17, seen from Sitaro, North Sulawesi. It also triggered lightning in the ash cloud -- a common phenomenon in powerful volcano eruptions.