The south flank of the erosionally modified Tequila volcano is seen in an aerial view. The oldest lava flows from the Pleistocene stratovolcano overlie a south-flank rhyolitic lava dome dated at about 460,000 years. Summit crater activity ceased about 210,000 years ago, but flank eruptions producing andesitic lava flows and basaltic cinder cones continued until the late Pleistocene.

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