Soche
Socheis a 3,955-metre-high (12,976 ft)daciticvolcanoinEcuadorand is located on the northern end of a secondary volcanic chain. Constructed on aPaleozoicsubstratum, it contains an eastwards-openingcalderain the summit region. A large eruption in 6650 BCE generated ashfall intoColombiaand two lava domes in the caldera.[1]The ash- andlapilli-fall is about a metre thick in the Interandean valley and the neighbouring cordilleras and most likely represented a long-lasting obstacle for human population.[2]Earlier eruptive events involving a lava flow that was subsequently offset by a fault zone named the Cayambe-Chingual fault by 110m occurred 9.67 ka BP,[3]and another involving a pyroclastic flow was dated at 37.22 ± 0.63 ka BP.[4]
References
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- ^"Soche".Global Volcanism Program.Smithsonian Institution.29 July 2015.
- ^Hall, Minard L.; Mothes, Patricia A. (2008). "Volcanic impediments in the progressive development of pre-Columbian civilizations in the Ecuadorian Andes".Journal of Volcanology and Geothermal Research.176(3): 344–355.doi:10.1016/j.jvolgeores.2008.01.039.ISSN0377-0273.
- ^Tibaldi, A.; Rovida, A.; Corazzato, C. (2007). "Late Quaternary kinematics, slip-rate and segmentation of a major Cordillera-parallel transcurrent fault: The Cayambe-Afiladores-Sibundoy system, NW South America".Journal of Structural Geology.29(4): 664–680.doi:10.1016/j.jsg.2006.11.008.ISSN0191-8141.
- ^Egbue, Obi; Kellogg, James (2010). "Pleistocene to Present North Andean" escape "".Tectonophysics.489(1–4): 248–257.doi:10.1016/j.tecto.2010.04.021.ISSN0040-1951.
0°33′07″N77°34′48″W/ 0.552°N 77.58°W
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