Global Volcanism Program | Image GVP-03003

Snow-capped Halla shield volcano is seen here from the north, near Cheju city, the largest on Cheju Island. Voluminous lava flows and an underlying lava plateau form the entire 40 x 80 km island. The volcano is capped by the 400-m-wide Backlockdam summit crater and its flanks contain hundreds of cones, some of which form small offshore islands. Photo by Norm Banks, 1980 (U.S. Geological Survey).

Snow-capped Halla shield volcano is seen here from the north, near Cheju city, the largest on Cheju Island. Voluminous lava flows and an underlying lava plateau form the entire 40 x 80 km island. The volcano is capped by the 400-m-wide Backlockdam summit crater and its flanks contain hundreds of cones, some of which form small offshore islands.

Photo by Norm Banks, 1980 (U.S. Geological Survey).

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