Aravalli Range
Aravalli Range (Geography)
Why In News:
A new study has highlighted the critical ecological role of the Aravalli range in preventing Thar Desert dust from spreading into the Indo-Gangetic Plains, with implications for agriculture, air quality, and human health.
About the Aravalli Range
The Aravallis are the oldest fold mountains in the world, formed about 1,500 million years ago (Precambrian era). They are eroded remnants of ancient mountains.
They run for approximately 692 km from Delhi (Raisina Hill) to Palanpur in Gujarat, passing through Rajasthan and Haryana.
They act as a watershed dividing the Indus and Ganga river systems.
Highest peak: Guru Shikhar (Mt. Abu, 1,722 m).
Key Facts for Prelims
The Aravallis separate the Marwar Plains (west) from the Mewar Plateau (east).
They are not part of the Western Ghats (a separate hill range along India's west coast — a common confusion in MCQs).
Lakes in the Aravallis: Ana Sagar, Sambhar, Nakki Lake (Mt. Abu), Siliserh Lake.