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Chascon de Purico |
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| Synonyms: None | ||
| Location: 23º01'S; 67º48'W | ||
| Country: Chile | ||
| Summit Elevation: 5018m | ||
| Edifice Height: 418m | ||
| Type: Dome |
Morphologically distinct from the examples above are small silicic bodies of the type represented by Cerro Chascon de Purico (23° 01'S 67° 41'W) and Cerro Aspero (23° 05'S 67° 42'W) which are both late extrusives on the summit region of the Purico shield complex. The former is a 400m high flow/dome complex built up by a series of stubby, viscous lava flows and minor pyroclastic activity, while the latter is a tent-shaped, perhaps Peléean-type dome, about 300 m in height. Unlike the flat-topped tortas described above, Chascon de Purico and Aspero are both conical in shape and their lavas are typically glassy and relatively crystal poor. The difference in morphology reflects the difference in rheological properties of the two types of magmas which would result in different eruption characteristics (e.g. Blake, 1989).