The approximate age of the Aravallis range is :
✓ Correct answer: d) 670 million year
ExplanationThe Aravalli Range, one of the world’s oldest mountain systems, is estimated to be around 670 million years old based on geological studies and radiometric dating techniques.Some re- searchers even suggest its origins could date back further, making it as old as 2-4 billion years, but its prominent development and erosion cycles place its approximate age at 670 million years.The Aravalli Range, formed during the Proterozoic Era through tectonic collisions that created the Aravalli-Delhi Fold Belt, has been eroded over millions of years into its pres- ent low-lying form.Stretching approximately 700 km across Rajasthan, Haryana, Delhi, and Gujarat, the range is geolog- ically rich, with metamorphic and igneous rocks containing valuable minerals like lead, zinc, marble, and mica.Ecologically, it serves as a biodiversity hotspot and acts as a natural barrier against the spread of the Thar Desert.Cul- turally, the Aravallis house ancient forts, temples, and land- marks such as Mount Abu and the Dilwara Temples, mak- ing them historically and environmentally significant.310
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