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Adak Island

  • Type: Island

Violent geologic events formed Adak Island: erupting volcanoes and tectonic subduction (movement of the oceanic crust toward and beneath the continental crust). Advancing and receding glaciers, frequent rainfall, and high winds sculpted the island's dramatic hills, valleys, cliffs, and floodplains.

Adak is located about half way out the Aleutian chain and is adjacent to and overlying a zone at the boundary of the Pacific and the North American tectonic plates. The Pacific plate moves under the edge of the other. Earthquakes continue to shake Adak.- USFWS

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Adak Island


Name of Notable Genus AsNotedIn No Address Proximity Area
Name Genus AsNotedIn Address Proximity Area
Adak Army Base and Adak Naval Operating Station
  • Sight
  • NRHP
  • US NHL
Roughly bounded by Cape Adagdak, Scabbard Bay, and Shagak Bay

Geography »

Physiographic Data
Highest Point: Mt Moffett: 1,181 m
Lowest Point: Bering Sea: 0 m
Area: 711 sq km

Data »

Particulars for Adak Island:
Physiographic feature Island
Tectonic plate North American Plate
Tectonic plate Pacific Plate

Activities »

As near to Asia as to North America, Adak offers the chance to see birds seldom found elsewhere. Sea otters and seals can be seen in a saltwater lagoon, and whales ply the offshore waters. Bald eagles are common sights. - USFWS

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