Abajo Mountains

Abajo Mountains

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 highest 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. These mountain ranges are part of the Colorado Plateau province, west of the Rocky Mountains and geologically distinct from them.

The name "Abajo" comes from a Spanish word meaning "low". [cite book|title=The Origin of Certain Place Names in the United States|year=1905|pages=22|author=Gannett, Henry|url=http://books.google.com/books/pdf/The_Origin_of_Certain_Place_Names_in_the.pdf?id=BqwPAAAAIAAJ&output=pdf&sig=3IVIg6u-evPGlrv4j1uDL7rQ09c]

Notes

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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