San Pablo (volcano)
| San Pablo | |
|---|---|
Volcan San Pablo from just below the summit on San Pedro volcano | |
| Highest point | |
| Elevation | 6,110 m (20,050 ft) |
| Prominence | 808 m (2,651 ft) |
| Parent peak | San Pedro |
| Coordinates | 21°53′02″S 68°20′33″W / 21.88389°S 68.34250°W |
| Geography | |
| Location | Chile |
| Parent range | Andes |
| Geology | |
| Mountain type | Stratovolcano |
| Climbing | |
| First ascent | September 1910 by Hans Berger (Germany) |
| Easiest route | North side to col then west slopes |
San Pablo is a dormant volcano located in the Antofagasta Region of Chile, near the Bolivia border. It is joined to the younger San Pedro volcano by a high col. It is located in the Chilean province of El Loa, city of Calama and Ollagüe.
San Pablo was active in pre-glacial times. After that period, glaciations formed a girdle of moraines and the mountain was covered by ash fall from neighbouring San Pedro. Its central crater was eroded and a glacier formed inside. The volcano itself is formed by three groups of andesite lavas which variously contain pyroxene or hornblende; these groups are known as the Lower Group, the Middle Group and the Summit Group.