The Aravalli Hills look modest today but they sit on some of the oldest and most studied rocks in India. This means the ‘raw material’ for the Aravalli Hills first appeared as sedimentary layers in the basins rather than as a preexisting ridge. Geology to environmentThe geology of the Aravalli Hills influences the local soils and movement of water by the kinds of rocks present, the way those rocks break and weather, and the rainfall patterns. In many parts of the Aravalli Hills, most of the monsoon rains arrive in a few months and there are long dry periods in between. Because the Hills’ soils are typically thin and there’s little water outside the southwest monsoon, even small disturbances can have lasting effects.

Source: The Hindu December 28, 2025 08:14 UTC