San Pablo | |
---|---|
![]() Volcan San Pablo from just below the summit on San Pedro volcano | |
Highest point | |
Elevation | 6,110 m (20,050 ft)[1] |
Prominence | 808 m (2,651 ft)[2] |
Parent peak | San Pedro |
Coordinates | 21°53′02″S 68°20′33″W / 21.88389°S 68.34250°W[1] |
Geography | |
Location | Chile |
Parent range | Andes |
Geology | |
Mountain type | Stratovolcano |
Climbing | |
First ascent | September 1910 by Hans Berger (Germany)[3][4][5] |
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.[6]
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.[7] 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.[8]