Cordillera the cordilleras in Ecuador, Peru, Bolivia, Chile, and Argentina. Mountain ranges of this type have a complex structure, usually the result of folding and faulting accompanied by volcanic activity. In South America the ranges include numerous volcanic peaks. (Though not itself a volcano, Argentina's Mt. Aconcagua, at 22,834 feet (6,960 metres) high, is the highest point in the Western Hemisphere. The Andes cordillera has Ojos del Salado, the highest active volcano in the world, and second highest point in the Western Hemisphere. A number of the volcanoes have been active in historic times. Aside from the volcanic peaks, the crests
Blackhead Mountains Blackhead Mountains The Blackhead Mountains range is located near the northern end of the Catskill Mountains, in Greene County, New York, United States, where it divides the towns of Windham and Jewett. The three named peaks in the range — Thomas Cole Mountain (3,940 feet; 1,201 m), Black Dome (3,980 feet; 1,213 m), and Blackhead Mountain (also in the 3,940-foot range) — are the fourth-, third-, and fifth-highest peaks in the Catskills, respectively. The gap between Thomas Cole and Black Dome is, at 3,700 feet, the highest in the Catskills. To the west of Thomas Cole are two lesser, officially