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EspañolABAJO MOUNTAINS
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The 'Abajo Mountains', also called the 'Blue Mountains', are a small mountain range west of Monticello, Utah, south of Canyonlands National Park and north of Blanding, Utah. The mountain range is located within the Manti-La Sal National Forest. The largest peak within the range is Abajo Peak at 11,360 ft (3,463 m).
This mountain range, like both the La Sal Range and Henry Mountains in the same part of the Colorado Plateau, is formed about igneous intrusions that are relatively resistant to erosion. Some of these intrusions form laccoliths emplaced at depths of a few kilometers. The predominant igneous rock is porphyritic hornblende diorite. Ages of intrusion in the Abajo Mountains fall in the interval from 22 to 29 million years.
Mountain ranges associated with laccoliths and other igneous intrusions on the Colorado Plateau, southwestern United States. The red dot marks the Four Corners, the intersection of Utah, Colorado, New Mexico, and Arizona. L, La Sal Range; 'A, Abajo Mountains'; S, (Sleeping) Ute Mountain; C, Carrizo Mountains; N, Navajo Mountain; H, Henry Mountains. Cropped, marked, and lower resolution from original image of NASA Visible Earth http://veimages.gsfc.nasa.gov//2883/4corners_2002160.jpg
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References
★ Jules D. Friedman and Curtis Huffman, Jr., coordinators, ''Laccolith Complexes of Southeastern Utah: Time of Emplacement and Tectonic Setting -- Workshop Proceedings'', United States Geological Survey Bulletin 2158, 1998. http://pubs.usgs.gov/bul/b2158/B2158.pdf
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