Post-caldera resurgent blocks of the early Pleistocene La Reforma caldera rise to the north above the Gulf of California. The roughly 10-km-wide caldera contains a 1300-m-high central dome (left-center horizon) made of resurgent basement rocks. Ignimbrite outflow sheets form flat surfaces and scarps, and uplifted marine terraces are prominent along the coast.

Photo by Brian Hausback, 1994 (California State University, Sacramento).

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

La Reforma