"Sangangüey, the highest volcano of the NW-SE-trending Tepic-Zacoalco graben, is an eroded andesitic and dacitic stratovolcano that contains a prominent lava spine at its summit. The NW and SE flanks of the Pleistocene edifice of Volcán Sangangüey are dotted with 45 cinder cones that erupted during the past 300,000 years along 5 parallel lines. Some of the cinder cones appear morphologically similar to cones on nearby Ceboruco volcano that are known to be less than 1000 years old. There are no confirmed historical eruptions from Sangangüey. An incorrect report of an eruption in 1859 from San Juan (a synonym of Sangangüey) refers to the nearby Pleistocene San Juan volcano. An Indian tradition records an eruption of Sangangüey in 1742 (Sapper, 1917). If these legends are true, they may refer to an eruption from one of the young flank cinder cones of Sangangüey."  -Smithsonian Volcano Archive
Back to Top