The scenic lake-filled Santa María del Oro maar was erupted through older Miocene rhyolitic tuffs of the Sierra Madre Occidental. The lake is seen here from the NW, with the large ridge behind it forming the axis of a large fold affecting the Miocene ashflow tuff deposits. The southern rim of the maar is reached by a road from the town of Santa María del Oro (right center). The peaks on the northern rim of the roughly 3-km-wide maar rise about 400 m above the Laguna Santa María crater lake.

Photo by Jim Luhr, 1979 (Smithsonian Institution).

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

Santa María del Oro