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Serdán-Oriental volcano

Serdán-Oriental volcano is a young volcanic field forming a closed basin at the eastern end of the Mexican Altiplano. It contains tuff rings and lake-filled maars (such as Laguna Atexcac and Laguna Alchichica), cinder cones, lava domes and lava flows.
The date last volcanic activity is unknown, but occurred less than 10,000 years ago. A major explosive eruption from a now probably buried vent produced the Quetzalapa plinian pumice-fall deposit 20,000 years ago.

Background:

The Serdán-Oriental basin was filled by extensive large lakes during the Pleistocene. It is bounded by the Cofre de Perote-Orizaba range on the east and Los Humeros caldera to the north.
The most prominent features of the Serdán-Oriental volcanic field are the twin Las Derrumbadas lava domes, surrounded by an apron of debris-avalanche deposits, and the sharp-peaked Cerro Pizarro lava dome at the northern end of the basin.
(Smithsonian / GVP volcano information)

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