India's geography includes some of the world's oldest rock formations. The question of which is the oldest mountain range is important for UPSC, SSC, and school exams.
The Aravalli Range acts as a critical climatic barrier — preventing the Thar Desert from expanding eastward. Its degradation has contributed to desertification in parts of Rajasthan and Haryana.
The Aravalli Range is the oldest mountain range in India.
The Aravallis are among the oldest fold mountains in the world — they are so ancient and weathered that they are now more hills than mountains.
The Aravalli Range was formed during the Precambrian Era — before the Himalayan mountains even existed. The Himalayas are relatively young (formed ~50 million years ago when the Indian plate collided with the Eurasian plate). The Aravallis are remnants of mountains that existed before the continents took their current form.
The **Himalayas** are India's youngest mountains — formed approximately 40–50 million years ago by the collision of the Indian and Eurasian tectonic plates.
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