|
|
 image info |
|
La Poruña |
| Synonyms: None |
| Location: 21º53'S; 69º30'W |
| Country: Chile |
| Summit Elevation: 3800m |
| Edifice Height: 300m |
| Type: Discrete Satellite Vent |
La Poruña Info
Many small volcanoes occuring as discrete satellite vents to large central volcanoes are also common in the Central Andes. La Poruna (21°53'S 69°30'W), a perfectly formed scoria cone, may be a satellite vent to Volcan San Pedro. This 180 m high cone has a basal diameter of 900 m and has a prominent bocca on the western side from which an 8 km long compound lava flow was erupted (Figure M15a & b). Similar young satellite vents are also associated with Chachani, Parinacota, Ollague, and Socompa volcanoes. Apart from their physical similarity, most of these lateral eruptions have two other features in common; in almost every case they are associated with regional faults or lineaments and their erupted products are the most mafic and primitive erupted from the volcano (e.g. O'Callaghan & Francis, 1986; Wörner et al., 1988).
back to CVZ VOLCANO INDEX....
