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Basin and Range Province: Map

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Full extent of the Basin and Range
The Basin and Range Province is a large geologic province which includes parts of the southwestern United Statesmarker and northwestern Mexicomarker, typified by basin and range topography.


Typical road across central Nevada stretching from one range, across the basin, to another range

Geography

The province extends east from the Sierra Nevada all the way to the Colorado Plateau and extends south over northern parts of the Baja California Peninsula. This covers parts of the U.S. states of Arizonamarker, Californiamarker, Idahomarker, New Mexicomarker, Texasmarker, Oregonmarker, and Utahmarker and virtually all of Nevadamarker (a small northern portion of Elko County, Nevadamarker drains to the Snake River). Basin and Range topography also dominates large parts of the Mexican states of Sonoramarker, Chihuahuamarker, and Baja Californiamarker. The arid Great Basin is part of this province as well as most of the Sonoran Desertmarker and the Chihuahuan Deserts.

Geology

The topography of the Basin and Range is a result of crustal extension within this part of the North American Plate. The cause of this extension is as yet not fully understood, although several hypotheses have been offered. The crust here has been stretched up to 100% of its original width. In fact, the crust underneath the Basin and Range, especially under the Great Basin, is some of the thinnest in the world. Along the roughly north-south-trending faults mountains were uplifted and valleys down-dropped, producing the distinctive alternating pattern of linear mountain ranges and valleys of the Basin and Range province.

Mineral resources

The Basin and Range province supplies nearly all the copper and most of the gold, silver, and barite mined in the United Statesmarker. A small amount of petroleum is produced within the province, in Nevadamarker.

See also



Notes

  1. Geologic Provinces of the United States: Basin and Range Province on USGS.gov websiteRetrieved 9 November 2009


References

  • Baldridge, W. Scott, Geology of the American Southwest: A Journey Through Two Billion Years of Plate Tectonic History , Cambridge University Press, 2004. ISBN 0-521-01666-5
  • McPhee, John, Basin and Range. Noonday Press, 1990. ISBN 0-374-51690-1
  • Plummer, McGeary, Carlson, Physical Geology, Eight Edition Boston: McGraw-Hill, 1999, pages 321, 513, 514 ISBN 0-697-37404-1
  • Stanley, Steven M.,Earth System History. W.H. Freeman and Company, 1999, pages 537, 540-543, 545 ISBN 0-7167-2882-6



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