The steep walls of the 1902 explosion crater at Santa María expose a sequence of alternating thin (1-10 m) light-colored lava flows and brownish-colored block-and-ash flow deposits. Growth of the cone involved the extrusion of lava flows, mostly from the summit vent.

Photo by Bill Rose, 1974 (Michigan Technological University).

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

Keywords: stratigraphy | outcrop | geology | tephra | crater | deposit

Santa María