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Shield and Strato-Volcanoes of Umnak Island, USA

53.1N 168.5W

December 9th, 2009 Category: Volcanoes

Alaska, USA - November 10th, 2009

Alaska, USA - November 10th, 2009

Volcanoes with distinctive shapes can be observed on Umnak Island, one of the Aleutian Islands that are part of the state of Alaska, USA, in this orthorectified image. The northern end of the island is mostly occupied by the circular volcanic caldera of Mount Okmok.

The southern end of the island is home to the steep symmetrical cone of Mount Vsevidof  and the heavily eroded Mount Recheshnoi (right of the former).

Both Mount Vsevidof and Mount Recheshnoi are stratovolcanoes, while Mount Okmok is a shield volcano. The summit of Mount Vsevidof is the highest point on Umnak Island at 7051 ft (2149 m), while its neighbor Mount Recheshnoi is lower, due in part to erosion, with a maximum elevation of 6,509 feet (1984 m). Returning to the north end of the island, Mount Okmok itself, near the caldera rim, is much lower than its southern-end counterparts, with a height of 3,520 feet (1073 m).

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