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Global Volcanism Program | Image GVP-07276

Light-colored rhyolitic airfall pumice deposits from Coatepeque caldera are exposed in a quarry 20 km east of the caldera.  These pumice-fall deposits blanket much of SW El Salvador, and along with associated pyroclastic-flow deposits have a volume of about 56 cu km.  The earlier biotite-bearing Arce deposits originated during the largest eruption from Coatepeque about 72,000 years ago and are a half-meter thick at the Guatemalan border.  The overlying Congo deposits originated during the second largest eruption of Coatepeque. Photo by Carlos Pullinger, 1996 (Servicio Nacional de Estudios Territoriales, El Salvador).

Light-colored rhyolitic airfall pumice deposits from Coatepeque caldera are exposed in a quarry 20 km east of the caldera. These pumice-fall deposits blanket much of SW El Salvador, and along with associated pyroclastic-flow deposits have a volume of about 56 cu km. The earlier biotite-bearing Arce deposits originated during the largest eruption from Coatepeque about 72,000 years ago and are a half-meter thick at the Guatemalan border. The overlying Congo deposits originated during the second largest eruption of Coatepeque.

Photo by Carlos Pullinger, 1996 (Servicio Nacional de Estudios Territoriales, El Salvador).


Coatepeque Caldera