Ceboruco
Cooled lava flows preserved around the volcano keep a record of the recent eruptions. Before the Jala eruption, there is record of one major lava flow, called the Destiladero flow. During the 500 years after the Jala eruption, the volcano was at its most active, leaving record of six major lava flows: the Copales, El Cajón, Coapan I, Coapan II, El Norte, and Ceboruco flows, all before the Spanish arrived in 1521. The volcano remained active until the next major eruption in 1870, however volcanism was, for the most part, constrained within the calderas.
Lava extruded from the volcano is primarily trachydacite to trachyandesite in composition, transitioning from more andesitic to more dacitic compositions over time. The magma is likely a mix from three different sources, a rhyodacite source, a dacite source (likely itself a mixture of rhyodacite and basalt), and a mafic source.
References
- ^ "Ceboruco". Global Volcanism Program. Smithsonian Institution. Retrieved 2010-07-09.
- ^ Sieron, K.; Siebe, C. (2008). "Revised stratigraphy and eruption rates of Ceboruco stratovolcano and surrounding monogenetic vents (Nayarit, Mexico) from historical documents and new radiocarbon dates". Journal of Volcanology and Geothermal Research. 176: 241–264. Bibcode:2008JVGR..176..241S. doi:10.1016/j.jvolgeores.2008.04.006.
- ^ Chertkoff, D.G.; Gardner, J.E. (2003). "Nature and timing of magma interactions before, during and after the caldera-forming eruption of Volcan Ceboruco, Mexico". Mineral Petrol. 146: 715–735.