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Global Volcanism Program | Image GVP-01048

The debris-avalanche deposit produced by the 1772 collapse of Papandayan volcano contains abundant angular clasts including the sulfur-rich clast beneath the rock hammer, in a hydrothermally altered, clay-rich matrix. Extensive thermal alteration of rocks within the volcano had occurred prior to the collapse. Photo by Lee Siebert, 1995 (Smithsonian Institution).

The debris-avalanche deposit produced by the 1772 collapse of Papandayan volcano contains abundant angular clasts including the sulfur-rich clast beneath the rock hammer, in a hydrothermally altered, clay-rich matrix. Extensive thermal alteration of rocks within the volcano had occurred prior to the collapse.

Photo by Lee Siebert, 1995 (Smithsonian Institution).

Keywords: sulfur | debris avalanche deposit


Papandayan