A quarry along the road between Teocelo and Cosautlán de Carvajal exposes thick deposits of the 230 km³ Xáltipan Ignimbrite from Los Humeros volcano. This outcrop lies about 50 km SE of Los Humeros, beyond the Pico de Orizaba-Cofre de Perote range, much of which post-dates the 460,000-year-old ignimbrite. Eruption of the Xáltipan Ignimbrite, which covered an area of about 3,500 km², resulted in the formation of a 15 x 21 km wide caldera.

Photo by Lee Siebert, 2000 (Smithsonian Institution).

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

Keywords: outcrop | stratigraphy | ignimbrite | deposit

Los Humeros