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Mountains & Earth’s Interior Explained | Geological Time Scale, P & S Waves | UPSC Geography GS1 Dive into the fascinating world beneath your feet! This session comprehensively covers critical Physical Geography concepts for UPSC CSE – GS Paper 1, including: 📚 Topics Covered: ✅ Types of Mountains Caledonian, Hercynian, and Alpine Orogenies Old vs Young Fold Mountains Examples: Himalayas, Appalachians, Urals, Alps ✅ Geological Time Scale (GTS) Important Eras, Periods & Fossils Plant and Animal e