Cerro Overo
Cerro Overo is a maar lying at the foot of Chiliques volcano and close to Laguna Lejía, in the Antofagasta Region of northern Chile[1] over ignimbrites of Miocene-Pliocene age.[2] It is the result of a phreatomagmatic eruption, its maximum diameter is 600 metres (2,000 ft) and its depth is 80 metres (260 ft).[1] The maar formed in postglacial times and erupted basalts that originated in the deep crust, with no magma chamber.[2] The lavas are of lower crustal provenience and are among the least evolved of northern Chile.[3] According to a thesis published in 2017, it formed about 77,000 years ago.[4]
| Cerro Overo | |
|---|---|
.jpg) The maar is visible in the lower right corner of the image | |
| Highest point | |
| Elevation | 4,555 m (14,944 ft) [1] |
| Coordinates | 23°31′S 67°40′W [1] |
| Geography | |
  Cerro Overo | |
| Parent range | Andes |
| Geology | |
| Mountain type | Maar |
| Last eruption | Unknown[1] |
See also
References
- "Cerro Overo". Global Volcanism Program. Smithsonian Institution. Retrieved 2012-04-14.
- Matthews, S. J. (1999). "Empirical Calibration of the Sulphur Valence Oxygen Barometer from Natural and Experimental Glasses: Method and Applications". Mineralogical Magazine. 63 (3): 421–431. CiteSeerX 10.1.1.610.1913. doi:10.1180/002646199548510.
- Naranjo, José A. (1 May 2009). "Chemistry and petrological evolution of the Lastarria volcanic complex in the north Chilean Andes". Geological Magazine. 129 (6): 723. doi:10.1017/S0016756800008451.
- van Alderwerelt, Brennan Martin Edelman de Roo (2017-05-01). "Diverse monogenetic volcanism across the main arc of the central Andes, northern Chile". Theses and Dissertations: 59. doi:10.17077/etd.rx3wdk3y.
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