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Franklin Mountains (Texas) - Wikipedia, the free encyclopedia

Franklin Mountains (Texas)

From Wikipedia, the free encyclopedia

Franklin Mountains
Range
none South and North   Franklin mountains, shown left to right, El Paso, Texas, as seen from Fort Bliss
South and North Franklin mountains, shown left to right, El Paso, Texas, as seen from Fort Bliss
Country United States
States Texas, New Mexico
Highest point North Franklin Mountain
 - elevation 7,192 ft (2,192 m)
 - coordinates 31°54′10″N 106°29′36″W / 31.90278, -106.49333
Geology Sedimentary, Igneous
Orogeny Laramide orogeny
Period Cretaceous

The Franklin Mountains of Texas are a small range (23 miles long, 3 miles wide) that extend from El Paso, Texas north into New Mexico. The Franklins were formed due to crustal extension related to the Cenozoic Rio Grande rift. Although the present topography of the range and adjoining basins is controlled by extension during rifting in the last 10 million years, faults within the range also record deformation during the Laramide orogeny, between 85 and 45 million years ago.


The highest peak is North Franklin Mountain at 7,192 feet (2,192 m). Much of the range is part of the Franklin Mountains State Park. The mountains are composed primarily of sedimentary rock with some igneous intrusions. Geologists refer to them as tilted-block fault mountains and in them can be found billion-year-old Precambrian rocks, the oldest in Texas.

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