Global Volcanism Program | Image GVP-06873
A dark-colored andesitic volcanic bomb, ejected in a plastic state with a ballistic trajectory, drapes older rhyolitic rocks. The bomb was ejected during the Ajata volcanic eruptions. Helium surface-exposure ages ranging between about 1385 and 6500 years ago were obtained from the three lava flows erupted from the Volcanes de Ajata. Note the ice axe for scale (right-center).
Photo by Oscar González-Ferrán (University of Chile).
This image is made available under the Creative Commons BY-NC 4.0 license terms.