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Cerro Chascon volcano

Lava dome 5125 m / 16814 ft
Bolivia, -21.88°S / -67.9°W
Current status: (probably) extinct (0 out of 5) | Reports
Cerro Chascon volcano books
Typical eruption style: unspecified
Cerro Chascon volcano eruptions: None during the past 10,000 years
Less than few million years ago (Pleistocene) No recent earthquakes
TimeMag. / DepthDistanceLocation

Background:

The lava dome of Cerro Chascon and the associated rhyolitic Cerro Runtu Jarita lava flow are located within the moat of Bolivia's Pliocene Pastos Grandes caldera. The roughly circular, flat-topped Cerro Chascon is located immediately NW of Laguna Khara. Cerro Runtu Jarita forms a roughly N-S-trending chain of small silicic lava bodies that probably represents the surficial expression of a subsurface dike. Minor eruptions of rhyolitic tephra preceded extrusion of the Cerro Runtu Jarita lavas. The age of Cerro Chascon was considered to by Holocene (de Silva and Francis, 1991), but new K-Ar dates give ages of 0.88-0.93 Ma (Watts et al., 1999).
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Source: Smithsonian / GVP volcano information


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