The scenic lake-filled Santa María del Oro maar, erupted through older Miocene rhyolitic tuffs, is one of the many dramatic volcanic features of the Tepic-Chapala graben. The southern rim of the maar (foreground) is reached by a road from the town of Santa María del Oro. The peaks of Cerro Los Lobos form the northern rim on the far side of the maar and rise about 400 m above the Laguna Santa María crater lake. Pyroclastic-surge deposits occur in valleys to the north and in some cases along the walls of the crater.

Photo by Lee Siebert, 1997 (Smithsonian Institution).

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

Santa María del Oro