El Negrillar
| El Negrillar | |
|---|---|
| Negros de Aras | |
 The cones in the image centre and associated black lava flows form the El Negrillar volcanic field. | |
| Highest point | |
| Elevation | 3,500 m (11,500 ft)[1] |
| Coordinates | 24°11′S 68°15′W / 24.18°S 68.25°W[1] |
El Negrillar is a volcanic field in the Andes. Located west of the , it generated cinder cones and andesitic lava flows. The volcanic field may be of Holocene age. Parts of the Socompa debris avalanche overlie the field.[1] The cones have volumes of less than 0.1 cubic kilometres (0.024 cu mi) and lava flows are thin and branch out dendritically.[2] Lava flows are up to 100 metres (330 ft) thick and overlie the Salín Formation.[3] The origin of the more basic lavas of this field has been explained with olivine differentiation.[4]
See also[]
References[]
- ^ Jump up to: a b c "El Negrillar". Global Volcanism Program. Smithsonian Institution. Retrieved 3 September 2015.
- ^ Deruelle, Bernard (1982). "Petrology of the plio-quaternary volcanism of the South-Central and Meridional Andes". Journal of Volcanology and Geothermal Research. 14 (1–2): 77–124. doi:10.1016/0377-0273(82)90044-0. ISSN 0377-0273.
- ^ Rissmann, Clinton; Leybourne, Matthew; Benn, Chris; Christenson, Bruce (2015). "The origin of solutes within the groundwaters of a high Andean aquifer". Chemical Geology. 396: 164–181. doi:10.1016/j.chemgeo.2014.11.029. ISSN 0009-2541.
- ^ Actas, II Congreso Geologico Chileno: ciudad de arica del 6 al 11 de Agosto de 1979 (in French). Instituto de Investigaciones Geologicas. 1980. p. 218.
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