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Glossary Terms
| Term (EN) | Definition | Exam Relevance |
|---|---|---|
| UNESCO Global Geopark | Protected area with internationally significant geological sites; managed for protection, education, and sustainable development; 213 globally (2024) | Core concept; India has ZERO yet |
| Geo-heritage | Geological features of outstanding scientific, educational, or aesthetic value; includes fossils, landforms, rock exposures | Topic's primary subject matter |
| Stromatolite | Layered biosedimentary structures formed by cyanobacterial mats; Bundi stromatolites are 1,600–1,800 Ma — oldest life evidence in Rajasthan | PYQ site identification |
| Petrified Wood | Fossilised wood where organic material replaced by minerals (silicification); Akal Fossil Park, Jaisalmer | PYQ — Akal Fossil Park question |
| Jurassic Period | Geological period 145–200 Ma; dinosaur dominance; Jaisalmer marine fossils; Akal wood fossils | Time period for Jaisalmer geo-heritage |
| Cretaceous Period | 66–145 Ma; end-of-dinosaurs; Barmer Basin dinosaur remains | Barmer Basin geological context |
| Palaeontology | Science of ancient life through fossils; Rajasthan has rich Jurassic and Precambrian records | Scientific discipline for geo-heritage |
| GSI (Geological Survey of India) | India's primary geological agency; declared 34 National Geological Monuments; founded 1851 | Protective institution for geo-heritage |
| National Geological Monument | GSI-declared sites of geological importance; 34 in India; Rajasthan: Akal Fossil Park, Barr (Pali) | Limited protection — no statutory backing |
| Geo-tourism | Tourism based on geological features and landscapes; alternative livelihood for desert/Chambal communities | Economic angle for geo-heritage topic |
| Ammonite | Extinct cephalopod mollusc; spiral shell fossil; abundant in Jaisalmer Jurassic marine rocks | Key fossil type in Jaisalmer Basin |
| Precambrian | Geological eon before 541 Ma; Aravalli Range (3,500 Ma) and Bundi stromatolites (1,600–1,800 Ma) | Age of Rajasthan's oldest geological assets |
| Lamheta Ghat | MP (Jabalpur); India's first UNESCO Geopark nomination (2022); still under evaluation 2024 | Comparative context; India's pending status |
| Aeolian Geomorphology | Study of wind-formed landforms; Thar Desert's relict dunes and interdune playas have geopark potential | Thar geo-tourism opportunity |
| Tethys Sea | Ancient ocean that once covered NW India; Jurassic marine fossils in Jaisalmer are remnants of Tethyan sediments | Explains marine fossils in a desert |
| Geoheritage | Conservation of geologically significant sites for scientific, educational, and cultural value; distinct from ecological heritage | Core policy concept for geoparks |
| Fossil | Preserved remains or traces of ancient organisms in rock; Rajasthan's fossils span Precambrian (stromatolites) to Jurassic (wood, ammonites) | Foundation concept for all geo-heritage PYQs |
| Stratigraphy | Branch of geology studying rock layers (strata) to interpret Earth's history; Jaisalmer's marine strata reveal Jurassic sea history | Scientific basis for geological age-dating |
| Proterozoic Eon | Geological eon from 2,500–541 Ma; part of Precambrian; Bundi stromatolites (~1,600 Ma) formed during this era; earliest complex life | Precise age reference for Bundi stromatolites |
| Aravalli Range | World's oldest fold mountain range (~3,500 Ma); geological heritage benchmark; exposes Precambrian basement rocks of Rajasthan | Oldest geological asset in Rajasthan |
| Tectonic Plate | Large segment of Earth's lithosphere; Indian Plate's northward drift formed Aravalli orogeny and left Tethyan marine sediments in Rajasthan | Explains Rajasthan's diverse geo-heritage |
| Geopark Nomination Dossier | Technical document submitted to UNESCO for Geopark status evaluation; requires geological inventory, management plan, and community involvement evidence | Procedural context; India's pending status |
Topic 90 of 138 | Paper II, Unit 3 — Earth Science / Geography & Geology | Generated: 2026-04-06