Juan Fernández Ridge - Mountains

geo.wikisort.org - Mountains

The Juan Fernández Ridge is a volcanic island and seamount chain on the Nazca Plate. It runs in a west–east direction from the Juan Fernández hotspot to the Peru–Chile Trench at a latitude of 33° S near Valparaíso. The Juan Fernández Islands are the only seamounts that reach the surface.

Map of the volcanic arcs in the Andes and subducted structures affecting volcanism

Subduction of the ridge beneath South America is thought to have caused the Pampean flat-slab and its associated inland tectonic deformation and reduced magmatic activity.[1][2]

References

Ramos, Victor A.; Cristallini, E.O.; Pérez, Daniel J. (2002). "The Pampean flat-slab of the Central Andes". Journal of South American Earth Sciences. 15 (1): 59–78. Bibcode:2002JSAES..15...59R. doi:10.1016/S0895-9811(02)00006-8.
Stern, Charles R (December 2004). "Active Andean volcanism: its geologic and tectonic setting". Revista Geológica de Chile. 31 (2): 161–206. doi:10.4067/S0716-02082004000200001. ISSN 0716-0208. Retrieved 2008-11-20.

von Huene, R.; Corvalán, J.; Flueh, E. R.; Hinz, K.; Korstgard, J.; Ranero, C. R.; Weinrebe, W. (1997), "Tectonic control of the subducting Juan Fernández Ridge on the Andean margin near Valparaiso, Chile", Tectonics, 16 (3): 474–488, Bibcode:1997Tecto..16..474V, doi:10.1029/96TC03703, S2CID 129668321

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Jurassic	Chacarilla Fm. Coihaique Gp. Ibáñez Fm. La Liga Fm. La Negra Fm. Nacientes del Biobío Fm. Nacientes del Teno Fm. Pan de Azúcar Fm. Tobífera Fm.
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