Global Volcanism Program | Image GVP-07739
Large angular 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. Large clasts to 6 m in exposed dimension occur nearby. Note the rock hammer in the center for scale.
Photo by Lee Siebert, 1999 (Smithsonian Institution).