The hill on the horizon is El Volcanicillo, a scoria cone that produced two lava flows down opposite sides of a ridge on the NE flank of Cofre de Perote volcano. The forested area extending across the photo below the cone is the Río Naolinco lava flow, a massive 900-year-old pahoehoe flow that reached as far as 50 km from El Volcanillo; the ‘a’a Toxtlacuaya flow traveled down the opposite side of the ridge. Highway 140 is in the foreground.

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: scoria cone

Cofre de Perote