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Franklin Mountains (Texas) facts for kids

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Franklin Mountains
El Paso Franklin Mountains and Scenic Drive aerial.jpg
Aerial view of the Franklin Mountains from the south, with El Paso's Scenic Drive at the bottom, and New Mexico's Organ Mountains on the horizon in the distance
Highest point
Peak North Franklin Peak
Elevation 7,192 ft (2,192 m)
Country United States
Orogeny Laramide orogeny
Age of rock Cretaceous
Type of rock Sedimentary, Igneous

The Franklin Mountains of Texas (previously known as Las Sierras de los Mansos) are a small range (23 miles long, 3 miles (4.8 km) 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 Peak 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 1.25 billion-year-old Precambrian rocks, the oldest in Texas.


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