Santiago Bay in Lake Atitlán is the result of encroachment by the flanks of three post-caldera volcanoes into the lake. The narrow channel extends about 8 km to the low southern caldera wall and is about 1 km wide. To the right are the San Pedro flanks, the oldest of the post-caldera stratovolcanoes. Contrasting eruptive styles produced the irregular shoreline in the left foreground consisting of lava flows from Tolimán and the smoother shoreline to the right, formed by pyroclastic deposits from Atitlán.

Photo by Bill Rose, 1980 (Michigan Technological University).

This image is made available under the Creative Commons BY-NC-ND 4.0 license terms.

Keywords: caldera

San Pedro

Tolimán