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Cerro Overo |
| Synonyms: None |
| Location: 23º53'S; 68º19'W |
| Country: Chile |
| Summit Elevation: 4600m |
| Edifice Height: 80m (depth) |
| Type: Discrete Maar |
Cerro Overo Info
Other mafic monogenetic features include discrete centers such as the maars of Cerro Overo, Cerro Tucle and large compound flows as at La Negrillar. Cerro Overo (23° 31'S 68° 19'W) is a young 600 m diameter maar erupted along a regional fault through a basement of ignimbrites. It is least silicic young volcanic rock so far found in the 21° to 24°S segment of the volcanic Central Andes (54.22% SiO2). Cerro Tucle is somewhat older but is also related to regional faulting. The siting of La Negrillar (24° 17'S 68° 36'W) has been controlled by by faults on the southwestern flank of the Atacama basin. This compound basaltic andesite cone and lava complex is valley confined but of considerable extent with a maximum dimension of about 16 km.
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