L31- Intrusive & Extrusive Igneous Rocks || Igneous Rocks & Volcano Landforms || UPSC IAS Geography скачать в хорошем качестве

L31- Intrusive & Extrusive Igneous Rocks || Igneous Rocks & Volcano Landforms || UPSC IAS Geography

Unlock the complete guide to Igneous Rocks and Volcanic Landforms—a must-know topic for UPSC IAS Geography, State PSC, and other competitive exams. This detailed lecture explains intrusive igneous structures such as Batholith, Laccolith, Phacolith, Lopolith, Sill, and Dyke, followed by the full range of extrusive igneous rocks and the spectacular volcanic landforms they create. Learn how magma cools inside the Earth’s crust to form giant underground bodies like batholiths and sills, and how lava eruptions on the surface produce famous features such as basalt plateaus, volcanic cones, lava domes, tuff beds, columnar basalt, and calderas. Key rock types—Basalt, Granite, Rhyolite, Andesite, Obsidian, Pumice, and Scoria—are explained with real-world examples including the Deccan Traps (India), Giant’s Causeway (Ireland), Mauna Loa (Hawaii), and Crater Lake (USA). This video also highlights the properties, composition, and texture of igneous rocks, the difference between intrusive (plutonic) and extrusive (volcanic) formations, and why igneous rocks are called the “parent rocks” of the Earth’s crust. Whether you are preparing for UPSC Prelims, Geography optional, or need a crisp yet comprehensive geology lecture, this session will strengthen your understanding of rock cycle processes, volcanic activity, and landform development. Get clear, exam-ready insights on: Silica-based classification: acid, intermediate, basic, and ultrabasic rocks. Textures: coarse, fine, glassy, and porphyritic. Landform examples: Deccan basalt plateaus, shield and composite volcanoes, cinder cones, and caldera lakes. Stay ahead in your UPSC CSE preparation with this high-value topic that repeatedly appears in GS Paper-1, Geography MCQs, and interview discussions. #UPSCGeography #IASGeography #UPSCPreparation #UPSC2025 #CivilServicesExam #UPSCPrelims #UPSCMains #GeographyOptional #IgneousRocks #VolcanicLandforms #GeologyLecture #EarthScience #GeographyClasses #gsdhillon #brainrootsias #UPSCStrategy #UPSCStudyMaterial #GeographyForUPSC #UPSCMotivation #UPSCExamPrep #UPSCNotes #UPSCFreeClass