The summit depression of Tequila volcano is breached narrowly to the NE and originated from erosional excavation. A prominent 300-m-high dacitic spine, left after erosional removal of softer rocks surrounding the vent, forms the dramatic steep-sided peak at the left. The spine was dated at about 210,000 years and probably represents the latest activity from the central vent.

Photo by Jim Luhr, 1979 (Smithsonian Institution).

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

Tequila