Global Volcanism Program | Image GVP-07569

The terraced Río Ameca valley cuts through flat-lying basaltic lava plateaus of the Northern Atenguillo volcanic field of Pliocene-to-early Pleistocene age. The northernmost of these basaltic plateaus, El Rosario, has been dated at about 640,000 years. Photo by Paul Wallace, 1998 (University of California Berkeley).

The terraced Río Ameca valley cuts through flat-lying basaltic lava plateaus of the Northern Atenguillo volcanic field of Pliocene-to-early Pleistocene age. The northernmost of these basaltic plateaus, El Rosario, has been dated at about 640,000 years.

Photo by Paul Wallace, 1998 (University of California Berkeley).

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Northern Atenguillo