Stop 36: Lascar
Lascar23°22'15.92"S, 67°44'35.00"W Elevation: 5488m (18062 ft)
Panorama from the Lascar Southern pyroclastic flow
Lascar is the most active volcano in the central Andes. It is an andesitic to dacitic stratovolcano with six overlapping craters, trending roughly northeast, with the active, fuming crater located near the center. The largest historical eruption of Lascar took place in 1993, producing pyroclastic flows to 8.5 km NW of the summit. Grey pumice deposits from the 1993 eruption are visible in the photo above and below.
Light, dark, and banded pumice are mixed in this flow.
And we made a few friends!
- Geology of the Altiplano
- Field Guide Stops 1-10
- Field Guide Stops 11-20
- Field Guide Stops 21-30
- Field Guide Stops 31-35
- Altiplano 09 Acknowledgements
- Altiplano Gallery 09
- Samples Gallery 09