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Cerro Azul Volcano, Chile

 Cerro Azul Volcano, Chile, Volcano photo


Cerro Azul Volcano, Chile

The gaping crater of the 1932 Quizapu eruption (left-center) lies below the summit of Cerro Azul stratovolcano.

Cerro Azul was constructed to the south of its twin volcano Descabezado Grande, where this photo was taken.

Steep-sided Cerro Azul has a 500-m-wide summit crater that is open to the north.

Quizapu was the source of one of the world's largest explosive eruptions of the 20th century in 1932.

This eruption created a 600-700 m wide, 150 m deep crater and ejected 9.5 cu km of dacitic tephra.

The Cerro Azul stratovolcano is at the southern end of the Descabezado Grande-Cerro Azul eruptive system.

Steep-sided 3788-m-high Cerro Azul has a 500-m-wide summit crater that is open to the north.

The three basaltic-andesite "La Resoloma Craters" scoria vents are located below the west flank and the two "Los Hornitos" scoria cones on the lower SW flank.

Quizapu, a major vent on the northern flank of Cerro Azul, formed in 1846 during the first historical eruption at Cerro Azul, accompanied by the emission of voluminous dacitic lava flows that traveled both east into the Estero Barroso valley and west into the Rio Blanquillo valley.

Quizapu was later the source of one of the world's largest explosive eruptions of the 20th century in 1932, which created a 600-700 m wide, 150-m-deep crater and ejected 9.5 cu km of dacitic tephra.

PHOTO SOURCE: Oscar Gonzalez-Ferran (University of Chile), courtesy of the Global Volcanism Program, Smithsonian National Museum of Natural History, used with permission.


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