Anvil Peak

Anvil Peak is a cone volcano on Semisopochnoi Island in Alaska’s western Aleutians and the highest point on both the island and the Rat Islands, reaching 1,221 metres on the north side. Its name, introduced by the United States Geological Survey in 1951, comes from a broad, nearly flat plateau near the summit that resembles an anvil and stands above cliffs exposing lava flows. Geologically, it has two volcanic summits, including a larger cone forming part of an older crater’s eroded rim. Probably formed after Mount Cerberus in the late Pleistocene, it has not erupted in recent times and was last active thousands of years ago.

Adak, Alaska · United States