L30- RockTypes & Igneous Intrusive Landforms | Batholith, Laccolith, Phacolith | UPSC IAS Geography скачать в хорошем качестве

L30- RockTypes & Igneous Intrusive Landforms | Batholith, Laccolith, Phacolith | UPSC IAS Geography

Understand Rocks and Igneous Landforms in a single comprehensive UPSC Geography video designed for IAS Prelims and Mains. This lecture explains what is a rock, the three major rock types—Igneous, Sedimentary, and Metamorphic—and focuses on the formation, classification, and features of Igneous Rocks, the “parent material” of Earth’s crust. Learn how magma and lava cool to create intrusive and extrusive igneous rocks, their silica-based classification (acid, intermediate, basic, ultrabasic) and textures (coarse, fine, glassy, porphyritic). We cover every important intrusive igneous landform—Batholiths, Laccoliths, Phacoliths, Lopoliths, Sills, and Dykes—with clear UPSC-relevant explanations and real examples like the Deccan Traps, Ranchi Batholith, and the Whin Sill. Key extrusive rocks such as Basalt, Andesite, Rhyolite, Obsidian, Pumice, and Scoria are explained with their composition, texture, and global occurrences, helping you understand how volcanic activity shapes landscapes. This detailed yet easy-to-follow session also connects the rock cycle, showing how igneous rocks eventually transform into sedimentary and metamorphic rocks through weathering, erosion, heat, and pressure. Perfect for UPSC CSE, State PSC, UGC NET, or anyone preparing for competitive exams that require a strong foundation in Indian Geography and Physical Geography. By the end of this video, you will be able to answer UPSC questions on: Definition of a rock and common rock-forming minerals (quartz, feldspar, mica, pyroxene) Formation of intrusive vs. extrusive igneous rocks Classification by silica content and texture Major intrusive forms: Batholith, Laccolith, Phacolith, Lopolith, Sill, Dyke Examples of important extrusive rocks and their economic importance Whether you are revising for UPSC Prelims Geography MCQs, writing Mains answers, or preparing for optional subjects like Geology or Geography, this session provides crisp concepts, factual clarity, and exam-oriented keywords. Boost your UPSC IAS Geography preparation with clear diagrams, keyword-rich explanations, and memory aids that help you recall facts during the exam. Don’t forget to like, share, and subscribe for more UPSC CSE 2025 content, covering topics from Indian Physical Geography, Geomorphology, Climatology, and Environment & Ecology. #UPSCGeography #IASPreparation #IgneousRocks #TypesOfRocks #GeographyOptional #UPSC2025 #RockCycle #IntrusiveRocks #ExtrusiveRocks #Batholith #DeccanTraps #UPSCPrelims #UPSCMains #PhysicalGeography #EarthScience #Geology #UPSCIAS #UPSCStudyMaterial #GeographyForUPSC #IndianGeography