Global Volcanism Program | Image GVP-10380

$Multi-colored individual units of the Acajutla debris avalanche deposit are offset along normal faults in this view of a quarry wall 6 km SE of the city of Sonsonate. Many blocks are unfractured, and some are shattered blocks with jigsaw textures. About 8 m of the quarry wall is exposed on the right-hand side. The voluminous Acajutla avalanche deposit was produced by late-Pleistocene edifice failure of Santa Ana; this quarry lies about 18 km from the volcano. Photo by Lee Siebert, 2002 (Smithsonian Institution).$

Multi-colored individual units of the Acajutla debris avalanche deposit are offset along normal faults in this view of a quarry wall 6 km SE of the city of Sonsonate. Many blocks are unfractured, and some are shattered blocks with jigsaw textures. About 8 m of the quarry wall is exposed on the right-hand side. The voluminous Acajutla avalanche deposit was produced by late-Pleistocene edifice failure of Santa Ana; this quarry lies about 18 km from the volcano.

Photo by Lee Siebert, 2002 (Smithsonian Institution).

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Keywords: debris avalanche deposit | hydrothermal alteration | outcrop | stratigraphy

Santa Ana