Deposits of the 1902 Plinian eruption are exposed in a 1-m-thick outcrop 3.2 km S 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 dacite pumice fragments. Pumice fall was reported in Tapachula across the Mexican border, and ashfall was reported in Mexico City.

Photo by Bill Rose, 1967 (Michigan Technological University).

This image is made available under the Creative Commons BY-NC-ND 4.0 license terms.

Keywords: outcrop | pumice

Santa María