The volcano is about 3.7 miles (6.0 km) in diameter at its base with a rough volume of 7.2 to 8.4 cu mi (30–35 km³).
The sides of the upper cone are relatively steep (in comparison to volcanoes in general).
Made up of pyroclastic flow deposits and lava flows, and resting on Mesozoic era rocks of the Aleutian Mountain Range batholith, the mountain has been somewhat weathered by movement of several glaciers that reside on it.
The current main vent is on the north side of the crater by the head of the Drift glacier.
Also present on the mountain are Holocene lahar deposits that extend as far as the Cook Inlet.
This mountain has produced andesite, basalt and dacite, with relatively silicic andesite dominant in recent eruptions.
The volcano is about 3.7 miles (6.0 km) in diameter at its base with a rough volume of 7.2 to 8.4 cu mi (30–35 km³). The sides of the upper cone are relatively steep (in comparison to volcanoes in general). Made up of pyroclastic flow deposits and lava flows, and resting on Mesozoic era rocks of the Aleutian Mountain Range batholith, the mountain has been somewhat weathered by movement of several glaciers that reside on it. The current main vent is on the north side of the crater by the head of the Drift glacier. Also present on the mountain are Holocene lahar deposits that extend as far as the Cook Inlet. This mountain has produced andesite, basalt and dacite, with relatively silicic andesite dominant in recent eruptions.
Mount Redoubt