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The geology of Alaska includes Precambrian igneous and metamorphic rocks formed in offshore terranes and added to the western margin of North America from the Paleozoic through modern times. The region was submerged for much of the Paleozoic and Mesozoic and formed extensive oil and gas reserves due to tectonic activity in the Arctic Ocean.
Brooks Range. The Brooks Range (Gwich'in: Gwazhał[1]) is a mountain range in far northern North America stretching some 700 miles (1,100 km) from west to east across northern Alaska into Canada 's Yukon Territory. Reaching a peak elevation of 8,976 feet (2,736 m) on Mount Isto, the range is believed to be approximately 126 million years old.
Misty Fjords National Monument (or Misty Fiords National Monument) is a national monument and wilderness area administered by the U.S. Forest Service as part of the Tongass National Forest. Misty Fiords is about 40 miles (64 km) east of Ketchikan, Alaska, along the Inside Passage coast in extreme southeastern Alaska, comprising 2,294,343 acres ...
Download as PDF; Printable version; In other projects Wikimedia Commons; ... Pages in category "Geology of Alaska" The following 14 pages are in this category, out of ...
Geography of Alaska. Alaska occupies the northwestern portion of the North American continent and is bordered only by Canada on the east. It is one of two U.S. states not bordered by another state; Hawaii is the other. Alaska has more ocean coastline than all of the other U.S. states combined. [ 1 ] About 500 miles (800 km) of Canadian ...
Tectonic map of Alaska and northwestern Canada showing main faults and historic earthquakes Denali Fault and the Denali National Park boundary. The Denali Fault is a major intracontinental dextral (right lateral) strike-slip fault in western North America, extending from northwestern British Columbia, Canada to the central region of the U.S. state of Alaska.
Unalaska Formation. The Unalaska Formation is a Miocene Era geologic formation on Amaknak Island and Unalaska Island, in the Aleutian Islands archipelago of southwestern Alaska. [1] It consists mainly of volcanic breccia, flows, tuff, and intercalated sedimentary rocks. [1] It is exposed over about 70 percent of Unalaska Island.
Cook Inlet Basin. Coordinates: 59.7360°N 152.3844°W. The Cook Inlet Basin is a northeast-trending collisional forearc basin that stretches from the Gulf of Alaska into South central Alaska, just east of the Matanuska Valley. It is located in the arc-trench gap between the Alaska-Aleutian Range batholith and contains roughly 80,000 cubic miles ...