Global Volcanism Program | Image GVP-08707
Alaska's Mount Wrangell is one of the most voluminous shield volcanoes in the world and is more than three times the volume of Rainier. It has a diameter of 30 km at 2,000 m elevation and a volume of about 900 km3. Eruption of unusually-low viscosity andesitic lavas at high eruption rates produced long lava flows that contributed to its low-angle morphology. The small snow-covered peak on the left is Mount Zanetti, a flank vent with about the same volume as St. Helens. Wrangell is seen here from Glennallen, 80 km to the west.
Photo by Chris Nye (Alaska Division of Geological and Geophysical Surveys).
Keywords: shield volcano