Apastepeque volcano is a young volcanic field 8 km north of San Vicente town in central El Salvador. The Volcanic features contains about 24 closely spaced cinder cones, lava flows, lava domes, and maars. The latter are now filled by lakes, such as Laguna de Apastepeque and Laguna Chalchuapán.
The older vents in the volcanic field erupted andesitic-to-dacitic lava domes, sometimes following dacitic pumice eruptions. The younger vents formed basaltic cinder cones and phreatic and phreatomagmatic explosions left up to 100 m deep maars.
