Geology
The San Juan structural basin is 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. In 2007, the San Juan Basin produced 1.32 trillion cubic feet of natural gas, making it the largest source of natural gas in the United States. Uranium mining in New Mexico is also performed from the San Juan Basin.
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