The Aravalli Hills: India’s Oldest Mountain Range Introduction The Aravalli Hills are one of the most ancient mountain ranges in the world, stretching across north-western India. Rich in history, geology, and biodiversity, these hills have played a crucial role in shaping the climate, culture, and civilization of the Indian subcontinent. Despite their age and importance, the Aravallis often remain underappreciated compared to younger mountain systems like the Himalayas. Geographical Extent The Aravalli range runs for about 670 km , starting from near Delhi , passing through Haryana and Rajasthan , and ending in Gujarat . The hills form a natural barrier between the Thar Desert and the fertile plains of northern India. Highest Peak: Guru Shikhar (Mount Abu, Rajasthan) Average Height: 300–900 meters States Covered: Delhi, Haryana, Rajasthan, Gujarat Geological Importance The Aravalli Hills are estimated to be over 1.5 billion years old , making them among the oldest fold mount...