Global Volcanism Program | Image GVP-05516
Young scoria cones of the Chichinautzin volcanic field appear on the skyline above Mexico City. Many of the more than 150 small cones within the volcanic field are of Holocene age. At least two of the cones erupted less than 2,000 years ago, producing lava flows that impacted inhabited areas.
Photo by Lee Siebert, 1997 (Smithsonian Institution).