Deacon Peak scoria cone on Penguin Island contains a summit crater approximately 350 m wide and 75 m deep. The upper slopes of the cone are composed of reddish oxidized pyroclastic rocks. The formation of Deacon Peak was dated to about 1679 CE using lichenometry, which is based on the calibration of lichen growth rates.

Photo by Oscar González-Ferrán (University of Chile).

This image is made available under the Creative Commons BY-NC 4.0 license terms.

Keywords: scoria cone | crater | scoria | cone

Penguin Island