Interesting Nature Facts #10 – Chihuahuan Desert

Big Bend Archives · Leighton Photography & Imaging

The Chisos Mountains of Old West Texas

The Chisos Mountains are old. REALLY old for the Southern United States. These mountains were pushed up to elevations of more than 5,000 feet above sea level by a great deformation during the Cenozoic era (66 million years ago to present). Other geological uplifts during the older Cretaceous period (66 million to 144 million years ago) were also pushed up, and