Large clasts in an oxidized scoria matrix of the Acajutla debris avalanche deposit are exposed at the Pacific Ocean coastline more than 40 km from Santa Ana volcano. Clasts with a jigsaw fracture pattern can be seen at the top of the photo and clasts at least 6 m in diameter are nearby. Note the rock hammer in the center for scale.

Photo by Lee Siebert, 1999 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Keywords: debris avalanche deposit | oxidation | scoria | deposit | outcrop

Santa Ana