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As a Drainage Basin , the San Juan Basin is defined by the drainage of the San Juan River and its tributaries, which include the Animas River and the Florida River . The San Juan River flows into the Colorado River .

The drainage of the San Juan River is roughly coincident with the San Juan Structural Basin , a large downwarp of sedimentary rocks of mostly Mesozoic age. As a geologic region, the San Juan Basin is noted for its large deposits of Coal , Uranium , and Natural Gas . Since the 1980s, the Fruitland Formation in the basin has been one of the major US sources of Coalbed Methane .

The region is notable both by its marked Arid ity and by a rugged topography of Plain s and Valley s interspersed by Butte s, Canyon s and Mesa s. Its most striking features include Chaco Canyon (northwestern New Mexico, between Farmington and Santa Fe ) and Chacra Mesa . The San Juan Basin also has uplands that exceed elevations of 9,800 feet. As the region gently increases in elevation in a southeasterly direction, the Basin's streams flow to the northwest, eventually draining into the Colorado River .Fagan 2005, pp. 41-43.


CITATIONS



REFERENCES

  Last1 Fagan
  Given1 B
  Year 2005
  Title Chaco Canyon: Archaeologists Explore the Lives of an Ancient Society
  Publisher Oxford University Press
  ID ISBN 0-19-517043-1




SEE ALSO

Uranium Mining In The United States