San Juan Basin
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The San Juan Basin is a geologic structural basin located near the Four Corners region of the Southwestern United States. The basin covers 7,500 square miles and resides in northwestern New Mexico, so
The San Juan structural basin is generally the east portion of the San Juan River Watershed of 24,600 sq mi (64,000 km2) which extends farther west into Utah and Arizona.
Depiction of the Cretaceous Western Interior Seaway.
Generalized cross section of the San Juan Basin.
Geology of New Mexico
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The geology of New Mexico includes bedrock exposures of four physiographic provinces, with ages ranging from almost 1800 million years to nearly the present day. Here the Great Plains, southern Rocky
San Juan Basin
…configuration. The San Juan Basin is an asymmetrical syncline with three components: the Central Basin Platform, the Four Corners Platform, and the Chaco Slope (a.k.a. the Chaco Homocline). The basin is bound on the northwest by the Hogback Monocline (separating the Central Basin and Four Corners platforms…
A view of the Nambe Badlands
Basins of the Rio Grande Rift
Sandia Crest, an uplifted Mesoproterozoic batholith
Pennsylvanian limestone of the La Pasada Formation in the Sangre de Cristo Mountains