Cabezon Peak
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Cabezon Peak is Cabezon Peak is a large volcanic plug that is a prominent feature in northwestern New Mexico. It rises to 7,785 feet in elevation. Cabezon Peak is just south of the old town of Cabezon and the Rio Puerco. This volcanic neck is formed of basalt and is part of the Mount Taylor volcanic field. A volcanic neck or plug is formed when magma from an existing volcano solidifies in the pipe or neck and the surrounding sediment is eroded away. Marine Cretaceous rocks of the Mancos shale are exposed around its base. Cabezon means “big head” in Spanish.
References
Cabezon Peak Wilderness Study Area http://www.blm.gov/nm/st/en/prog/recreation/rio_puerco/cabezon_peak.html
Dictionary of Geological Terms, Anchor Press/Doubleday, third edition
Chronic, Halka, 1987, Roadside Geology of New Mexico: Roadside Geology Series, Mountain Press Publishing Company.
Volcanic plug. (2010, June 4). In Wikipedia, The Free Encyclopedia. Retrieved 20:56, June 26, 2010, from http://en.wikipedia.org/w/index.php?title=Volcanic_plug&oldid=366046542