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Unimak(o͞o`nĭmăk, yo͞o`–), volcanic island, 70 mi (113 km) long, off W Alaska. It is the largest of the Aleutian Islands, and nearest to the Alaska PeninsulaAlaska Peninsula,
SW Alaska, extending 500 mi (800 km) SW from the mainland, separating Bristol Bay and the Bering Sea from Cook Inlet, the Shelikof Strait, and Pacific Ocean.
..... Click the link for more information. . The highly symmetrical, cone-shaped Mt. Shishaldin (9,373 ft/2,857 m), one of the most active volcanoes in the Aleutian arc, is on Unimak.
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