Frequent eruptions have kept the Irazú summit craters devoid of vegetation. The thick dark-gray ash and scoria units that form the crater walls were emplaced during the 1963-65 eruptions.

Photo by Mike Carr, 1982 (Rutgers University).

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

Keywords: crater | stratigraphy | geology | outcrop | scoria | tephra

Irazú