Global Volcanism Program | Image GVP-08425
Thick sequences of tephra deposits from Amatitlán caldera are abundantly exposed in roadcuts in the Guatemala City area. This exposure, with INSIVUMEH geologist Otoniel Matías for scale at the lower right, is located south of the capital city, along the road to Palin. Major explosive eruptions from Amatitlán caldera have been dated between about 300,000 and less than 23,000 years ago. The northern caldera rim is buried by thick pyroclastic deposits and underlies portions of Guatemala City.
Photo by Lee Siebert, 1999 (Smithsonian Institution).