Thick deposits of folded and faulted Cretaceous limestones (lower right) are exposed in the steep 300-m-high walls of the Joya Honda maar. The northern wall of the maar (upper left) displays up to 120 m of initially dry and then wet pyroclastic-surge deposits with dips up to 30 degrees. The 850 x 1000 m wide maar was erupted about 1.1 million years ago.

Photo by Jorge Aranda-Gómez, 1994 (Universidad Autónoma de México).

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

Ventura Volcanic Field