Global Volcanism Program | Image GVP-11380
The lava flow in the foreground roadcut is part of the Quillelhue Basalts, which were erupted from an area at about 2600 m altitude on the NNW flank of Lanín, the snow-capped volcano in the background. The lavas form a basaltic field that reaches as far as Quillelhue Lake, more than 5 km from their source. The flows are bracketed by 2170 BP date for the Mamuil Malal dacitic block-and-ash flow and a 1650 BP date for an overlying pyroclastic-flow deposit.
Photo by Lee Siebert, 2004 (Smithsonian Institution).