Soche is a 3,955-metre-high (12,976 ft) dacitic volcano in Ecuador and is located on the northern end of a secondary volcanic chain. Constructed on a Paleozoic substratum, it contains an eastwards-opening caldera in the summit region. A large eruption in 6650 BCE generated ashfall into Colombia and two lava domes in the caldera.[1] The ash- and lapilli-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. ISSN 0377-0273.
- ^ 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. ISSN 0191-8141.
- ^ 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. ISSN 0040-1951.
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0°33′07″N 77°34′48″W / 0.552°N 77.58°W
Well, that’s interesting to know that Psilotum nudum are known as whisk ferns. Psilotum nudum is the commoner species of the two. While the P. flaccidum is a rare species and is found in the tropical islands. Both the species are usually epiphytic in habit and grow upon tree ferns. These species may also be terrestrial and grow in humus or in the crevices of the rocks.
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