The solitary Holocene Cerro Overo maar, seen here from the south, was erupted through basement ignimbrites of Pliocene age, which form the light-colored rocks in the crater wall. A thin blanket of dark ejecta from the eruption that created the 600-m-wide, 80-m-deep maar caps its rim. Pleistocene volcanoes of the central Chilean Andes form the horizon.

Copyrighted photo by Katia and Maurice Krafft, 1983.

Copyrighted image used with permission. All Rights Reserved. Contact photographer for any usage requests.

Cerro Overo