Global Volcanism Program | Image GVP-08103
The SE-most of the two Las Derrumbadas lava domes is seen here from the SE. The extensively altered dome is surrounded by debris avalanche deposits. The more recent avalanche deposits consist almost entirely of microcrystalline rhyolite from the core of the dome. They left horseshoe-shaped collapse scarps such as the one visible to the upper right. These scarps reveal areas of intense alteration to kaolinite produced by prolonged fumarolic activity.
Photo by Hugo Delgado-Granados, 1995 (Universidad Nacional Autónoma de México).
This image is made available under the Creative Commons BY-NC 4.0 license terms.