Physical Geography of India: Which mountain range is the oldest in India?

The Aravalli Range, extending across Rajasthan, Haryana, and Gujarat, is India's oldest mountain system, formed over 2 billion years ago during the Precambrian era. These ancient fold mountains have undergone extensive weathering and erosion, resulting in rounded peaks and relatively low elevation. The range plays a crucial role in Rajasthan's climate by intercepting moisture-bearing winds and preventing the westward expansion of the Thar Desert.