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American Cordillera

The American Cordillera is a chain of mountain ranges (cordillera) that consists of an almost continuous sequence of mountain ranges that form the western "backbone" of North America, Central America, South America and Antarctica.[1] It is also the backbone of the volcanic arc that forms the eastern half of the Pacific Ring of Fire.

From north to south, this sequence of overlapping and parallel ranges begins with the Alaska Range and the Brooks Range in Alaska and runs through the Yukon into British Columbia. The main belt of the Rocky Mountains along with the parallel Coast Ranges of mountains and islands continue through British Columbia and Vancouver Island. In the United States, the Cordillera branches to include the Rocky Mountains,[1] the Sierra Nevada, and the Cascades and Coast ranges of Washington, Oregon, and California. In Mexico, the Cordillera continues through the Sierra Madre Occidental and Sierra Madre Oriental, as well as the backbone mountains of the Baja California peninsula.

The ranges of the Cordillera from Mexico northwards are collectively called the North American Cordillera or Western Cordillera in the United States and Canada, and also named as the Canadian Cordillera or Pacific Cordillera in Canada.

The Cordillera continues on through the mountain ranges of Graham Land on the Antarctic Peninsula.

References

  1. ^ a b "Western Cordillera." Long Island University, C.W. Post Campus faculty website. Accessed June 2011.

Further reading

  • Silberling, N.J. et al. (1992). Lithotectonic terrane map of the North American Cordillera [Miscellaneous Investigations Series I-2176]. Reston, Va.: U.S. Department of the Interior, U.S. Geological Survey.

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