Global Volcanism Program | Image GVP-03191

Wizard Island is a scoria cone in Crater Lake caldera, which formed about 7,700 years ago. A lava flow from a vent on its NW flank forms the peninsula to the left. Llao Rock, a massive lava flow that forms the peak on the caldera rim, was erupted about 100-200 years prior to formation of Crater Lake caldera. Photo by Dave Wieprecht, 1995 (U.S. Geological Survey).

Wizard Island is a scoria cone in Crater Lake caldera, which formed about 7,700 years ago. A lava flow from a vent on its NW flank forms the peninsula to the left. Llao Rock, a massive lava flow that forms the peak on the caldera rim, was erupted about 100-200 years prior to formation of Crater Lake caldera.

Photo by Dave Wieprecht, 1995 (U.S. Geological Survey).

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Keywords: caldera | scoria cone

Crater Lake