Global Volcanism Program | Image GVP-07809
Deposits of the 1902 plinian eruption are exposed in a 1-m-thick outcrop 3.2 km south of Llano del Pinal, the saddle between Santa María and Siete Orejas volcanoes. The pumice is overlain by about 15 cm of finer-grained darker-colored ash. Most of the outcrop consists of light-colored dacitic pumice fragments. Pumice fall was reported in Tapachutla, across the Mexican border, and ashfall was reported in Mexico City.
Photo by Bill Rose, 1967 (Michigan Technological University).