The Coacoatzintla lava flow that fills this valley floor originated from a vent at the base of Rincón de Chapultepec crater in the foreground. It was dated to about 3,000 years ago and underlies the present-day town of Coacoatzintla, seen in front of the dark-colored hill below the right horizon. The flow, which traveled 6 km to the south, diverted around the hill (formed of limestone bedrock) into the valley of the Río Naolinco, which extends from right to left in the distance. This eruption is the youngest known from the Naolinco Volcanic Field.

Photo by Lee Siebert, 2000 (Smithsonian Institution).

This image is made available under the Public Domain Dedication CC0 license, but proper attribution is appreciated.

Keywords: volcanic field | lava flow

Naolinco Volcanic Field