Tres Virgenes

sopka (bez známé erupce za posledních ~12 000 let), Mexico, Eastern Pacific Volcanic Regions

Kde

Mexico, Eastern Pacific Volcanic Regions

Typ (GVP)

Stratovolcano(es)

Nadmořská výška

1 934 m

Poloha

27,470°, -112,591°

The Tres Vírgenes volcanic complex contains the only large stratovolcanoes in Baja California, rising above the Gulf of California in the east-central part of the peninsula. Three volcanoes, El Viejo, El Azufre, and La Vírgen, constructed along a NE-SW line, are progressively younger to the SW. The youngest, La Vírgen, is a stratovolcano with both dacitic and andesitic flank lava domes and lava flows. A major Plinian eruption from a SW-flank vent was radiocarbon dated at about 6,500 years, but Helium exposure and Uranium-series dates give a Pleistocene age (30.7 ka) for this event (Schmitt et al., 2006). A stratigraphic review (Avellan et al., 2018) noted that the 30.7 ka age is closer to the expected age of the tephra fall, and that the 22-25.5 ka (as determined by Schmitt et al., 2006) andesitic-dacitic lava flows dispersed around the cone are the youngest units in the complex. Although an ash plume from Tres Vírgenes was reported in 1746 by a Spanish Jesuit priest while navigating the Gulf of California, no tephra deposits from such a recent eruption have been found. A geothermal plant is located at the northern end of the complex near the margin of the Pleistocene El Aguajito caldera.

Text: Smithsonian Global Volcanism Program.

Údaje o sopce: Smithsonian Global Volcanism Program. Další sopky a průduchy.