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Global Volcanism Program | Image GVP-03988

MacKenney cone, the historically active vent of Pacaya volcano in Guatemala, was constructed within a horseshoe-shaped crater produced by collapse of the summit of an ancestral volcano about 1,100 years ago. The SW crater rim forms the steep-sided scarp at the right. The blocky hill in the foreground is a hummock from the debris avalanche produced by the collapse. The avalanche extended for 25 km. Photo by Lee Siebert, 1988 (Smithsonian Institution).

MacKenney cone, the historically active vent of Pacaya volcano in Guatemala, was constructed within a horseshoe-shaped crater produced by collapse of the summit of an ancestral volcano about 1,100 years ago. The SW crater rim forms the steep-sided scarp at the right. The blocky hill in the foreground is a hummock from the debris avalanche produced by the collapse. The avalanche extended for 25 km.

Photo by Lee Siebert, 1988 (Smithsonian Institution).

Keywords: debris avalanche | deposit | hummock


Pacaya