Geological Time Scale & Volcanism | Complete Geography | UPSC & UPPCS | By Himanshu Rai Sir | Lec-11

In this lecture, Himanshu Rai Sir explains two important topics of Physical Geography: Geological Time Scale and Volcanism. Understand the evolution of the Earth through geological history and learn about the causes, types, distribution, and significance of volcanic activity. 📌 Topics Covered: Part 1: Geological Time Scale Introduction to Geological Time Scale Major divisions: Eons, Eras, Periods, and Epochs Precambrian Time Paleozoic Era Mesozoic Era Cenozoic Era Evolution of life on Earth Major geological events and mass extinctions Important geological periods for competitive exams Part 2: Volcanism Meaning and causes of volcanism Difference between magma and lava Intrusive and extrusive volcanic features Types of volcanoes: Active, Dormant, and Extinct Types of volcanic eruptions Major volcanoes of the world Distribution of volcanoes and the Pacific Ring of Fire Volcanic landforms and their formation Important facts for UPSC and UPPCS Prelims 🎯 Useful For: UPSC Civil Services Examination UPPCS / UPPSC Prelims and Mains UPSSSC and other competitive examinations Geography optional and General Studies preparation 👨‍🏫 Faculty: Himanshu Rai Sir 📖 Subject: Complete Physical Geography 🎯 Focus: Conceptual clarity, important facts, and exam-oriented preparation. 👍 Like the video, share it with fellow aspirants, and subscribe for more Geography lectures. 🔥 Hashtags #GeologicalTimeScale #Volcanism #PhysicalGeography #GeographyByHimanshuRai #UPSC #UPPCS #UPPSC #GeographyLecture #Volcanoes #EarthHistory #CompleteGeography #UPSCPreparation #UPPSCPreparation