UPSC Combined Geo-Scientist Examination 2027 – 127 Geologist, Scientist & Other Posts Apply Online

• OBC तथा EWS candidates को fee exemption नहीं है।
• Fee once paid refund नहीं होगी और किसी अन्य examination के लिए reserve नहीं रखी जाएगी।
• Prescribed fee/mode के बिना application reject हो सकती है, unless valid fee remission applies.

Category-I – Geological Survey of India

PwBD reservations within above GSI vacancies

• Geologist: 1 OH (OA/OL)
• Chemist: 1 HH
• Assistant Geologist: 2 (1 OH OA/OL + 1 HH)
• Assistant Geophysicist: 3 HH
• Assistant Chemist: 1 HH

Category-II – Central Ground Water Board

PwBD reservations within above CGWB vacancies

• Scientist ‘B’ (Hydrogeology): 1 HH
• Assistant Hydrogeologist: 1 LDCP

• Vacancies tentative हैं और alteration के अधीन हैं।
• Appointments first instance में temporary basis पर होंगी।
• SC/ST/OBC/EWS/PwBD reservation Government rules के अनुसार लागू होगा।
• EWS certificate FY 2025-26 income पर आधारित, 01 April 2026 या उसके बाद और 22 September 2026 तक issued होना चाहिए।
• OBC-NCL certificate FY 2025-26, 2024-25 और 2023-24 income पर आधारित तथा 01 April 2026 या उसके बाद लेकिन 22 September 2026 से बाद का नहीं होना चाहिए।

Geologist Group ‘A’ – GSI

Geophysicist Group ‘A’ – GSI & Scientist ‘B’ Geophysics – CGWB

Chemist Group ‘A’ – GSI & Scientist ‘B’ Chemical – CGWB

Scientist ‘B’ Hydrogeology & Assistant Hydrogeologist – CGWB

Assistant Chemist Group ‘B’ – GSI / CGWB

Assistant Geologist Group ‘B’ – GSI

Assistant Geophysicist Group ‘B’ – GSI / CGWB

Important Qualification Conditions

• Master’s Degree संबंधित discipline में graduation के बाद minimum 2-year postgraduate degree है; integrated route भी official condition के अनुसार covered हो सकता है।
• Qualifying exam appeared/result-awaiting candidates provisional basis पर apply कर सकते हैं; Personality Test qualification पर Main result के बाद 10-day window में proof upload करना होगा।
• Government-approved foreign University की relevant Master’s degree वाले otherwise qualified candidate को Commission admit कर सकती है।
• Geo-Exploration / Applied Geology qualification वाला candidate Notice के अनुसार Geophysics तथा Geology/Hydrogeology streams के eligible posts में से application के समय केवल एक Stream/Discipline choose करेगा।
• Service allocation के लिए कम से कम एक participating service preference देना mandatory है।

Nationality

Age Relaxation

• DOB proof के लिए Matriculation/Secondary/Higher Secondary or accepted equivalent certificate की DOB मान्य होगी।
• Submitted DOB बाद में change नहीं की जा सकती।
• PwBD relaxation के बावजूद prescribed physical/medical standards satisfy करना जरूरी है।

• Main Examination के लिए लगभग total approximate vacancies के 6–7 गुना candidates shortlist होंगे।
• Preliminary qualification General Studies Paper-I और stream-specific Paper-II में UPSC-fixed minimum qualifying marks पर होगी; exact percentage Notice में नहीं दिया गया।
• Main-qualified candidates में से लगभग vacancies के 2 गुना candidates Personality Test के लिए बुलाए जाएंगे।
• Personality Test में कोई minimum qualifying marks नहीं है।

Tie-Breaking

1. Final marks equal होने पर relevant subject-specific Preliminary Paper-II + Main stream papers + Personality Test aggregate higher candidate above.
2. फिर subject-specific Preliminary Paper-II + Main stream papers aggregate.
3. फिर senior in age.
4. फिर UPSC discretion.

Stage-I Preliminary

• Objective OMR papers; questions English में set होंगे.
• Wrong answer पर 1/3 negative marking; multiple responses भी wrong; blank पर no penalty.
• Objective papers में calculator allowed नहीं है.

Stage-II Main

• Main papers Conventional/Descriptive Type होंगे और answers English में लिखने होंगे।
• Applicable stream का कोई Main paper miss करने पर candidature reject होगी और attempted part evaluate नहीं होगा।
• Non-Programmable Pocket Calculator allowed; programmable calculator/sharing prohibited.
• No Practical Examination.

Preliminary Paper-I General Studies

• Current events of national and international importance.
• History of India and Indian National Movement.
• Indian and World Geography – Physical, Social, Economic Geography.
• Indian Polity and Governance – Constitution, Political System, Panchayati Raj, Public Policy, Rights Issues.
• Economic and Social Development – Sustainable Development, Poverty, Inclusion, Demographics, Social Sector initiatives.
• Environmental Ecology, Biodiversity and Climate Change general issues.
• General Science.

Preliminary Paper-II Geology / Hydrogeology

• Physical Geology: Uniformitarianism; origin, differentiation and internal structure of Earth; atmosphere origin; earthquakes, volcanoes; continental drift, sea-floor spreading, isostasy, orogeny, plate tectonics; rivers/wind/glaciers/waves action; erosional/depositional landforms; weathering.
• Structural Geology: Stress, strain, rheology; planar/linear structures; folds/faults; Mohr circle; failure criteria; ductile/brittle shear; toposheets, V-rules, outcrop patterns; stereographic projections.
• Mineralogy: Symmetry, indices, Bravais lattices; mineral classification; isomorphism, polymorphism, solid solution, exsolution; silicates; physical/optical properties of olivine, garnet, pyroxene, amphibole, mica, feldspar, quartz.
• Igneous Petrology: Magma types/evolution; IUGS classification; forms/structures/textures; binary/ternary phase diagrams; differentiation/assimilation; granites, basalts, komatiites, carbonatite, kimberlite, lamprophyre, nepheline syenite.
• Metamorphic Petrology: Limits/types/controls; slate/schist/gneiss; porphyroblasts; zones/isograds/facies; geothermal gradients/facies series/plate tectonics.
• Sedimentology: Sediment origin, textures, grain-size, primary structures, sandstone/carbonate classification, siliciclastic environments/facies, carbonate diagenesis.
• Paleontology: Fossils/fossilization, species/binomial nomenclature, major invertebrates, Equidae/Hominidae evolution, Foraminifera/Ostracoda, Gondwana flora.
• Stratigraphy: Superposition; litho/bio/chronostratigraphy; Dharwar/Singhbhum/Aravalli cratons; mobile belts; Cuddapah/Vindhyan; Spiti/Kashmir/Damodar/Kutch/Trichinopoly/Siwaliks/Indo-Gangetic alluvium.
• Economic Geology: Deposit properties; ore-forming processes; coal/petroleum formation; Indian mineral/hydrocarbon deposits.
• Hydrogeology: Groundwater/aquifers; porosity/permeability/hydraulic conductivity/transmissivity; Darcy/Bernoulli/Reynolds; groundwater composition; H/O isotopes; artificial recharge.

Preliminary Paper-II Geophysics

• Solid Earth Geophysics: Solar System, Earth shape/rotation, gravity/magnetic fields, geomagnetism, elastic waves, internal Earth, plate tectonics, earthquakes/seismicity.
• Mathematical Methods: Vector/tensor calculus, matrices/eigen, gravitation, conservation laws, relativity, inverse theory, probability, ODE/PDE, numerical techniques, finite difference/elements.
• Electromagnetism: Electro/magnetostatics, Coulomb, Lorentz, Ampere, Biot-Savart, Gauss, Poisson/Laplace, Faraday, Maxwell, wave equations/potentials.
• Geophysical Prospecting: Gravity/magnetic/electrical/EM/well logging; seismic principles; signals/systems, sampling, Fourier/Laplace, convolution/correlation/power spectrum.
• Remote Sensing & Thermodynamics: EM spectrum, Stefan-Boltzmann/Wien/Planck, atmosphere/terrain interaction, thermodynamic laws/potential.
• Nuclear Physics & Radiometry: Nuclear properties, binding/fission/fusion, radioactivity/decay, detectors, matter waves/electron spin/atomic spectra.

Preliminary Paper-II Chemistry

• Chemical Periodicity; Chemical Bonding & Structure; Acids & Bases; Quantitative Inorganic Analysis; Kinetic Theory/Gaseous State; Chemical Thermodynamics/Equilibrium; Non-electrolyte Solutions; Electrochemistry; Basic Organic Chemistry; Stereochemistry; Organic Reaction Types; Molecular Rearrangements, with all official subtopics including Schrödinger equation, periodic trends, Born-Landé/Born-Haber, VBT/MOT, Werner theory, pH/buffers, titrations, Maxwell-Boltzmann, Gibbs/Helmholtz, Raoult/osmosis, Kohlrausch/Debye-Hückel, carbocations/carbanions/free radicals, R/S and E/Z, SN1/SN2/E1/E2, electrophilic/nucleophilic/radical additions and Wagner-Meerwein rearrangement.

Main Geology Paper-I

• Physical Geology & Remote Sensing: Earth evolution/internal structure, earthquakes/volcanoes, geodesy/isostasy, weathering/geomorphology, ocean floor, landscape evolution, India geomorphology, EM spectrum, spectral signatures, thermal/NIR/microwave sensing, digital image processing, LANDSAT/IRS/SPOT, aerial photo interpretation.
• Structural Geology: mapping, deformation/stress-strain, fold/cleavage/boudin/lineation/joint/fault analysis, stereographic projection, superposed deformation, microfabric/recrystallisation, shear zones, paleostress.
• Sedimentology: classification/textures, transport/deposition, Reynolds/Froude/Hjulstrom, structures, paleocurrent, sandstone/limestone/BIF/mudstone/conglomerate, diagenesis, facies models, carbonate platforms, sequence stratigraphy.
• Paleontology: fossil record/time scale, preservation/taphonomy, Ediacara, major invertebrates, microfossils, Gondwana plants, vertebrate evolution, paleo applications, mass extinctions.
• Stratigraphy: code/nomenclature/correlation, Archean nuclei/mobile belts/basins, Paleozoic/Mesozoic/Gondwana/Cenozoic successions and boundary problems.

Main Geology Paper-II

• Mineralogy: crystal symmetry/classes/bonding/Pauling, defects/twinning/zoning, optical mineralogy and major minerals.
• Geochemistry & Isotope Geology: geochemical reservoirs/cycles, meteorites, Goldschmidt, partition/diffusion/activity, trace elements/REE/Eh-pH, radiometric dating, stable isotopes, monazite dating.
• Igneous Petrology: magma properties, IUGS, nucleation/textures/evolution, mantle melting, phase diagrams, major igneous suites, alkaline rocks, metasomatism/hotspots/LIPs.
• Metamorphic Petrology: P-T-fluid controls, facies/isograds, structures/textures, ACF/AKF/AFM, thermodynamics/phase rule/Clausius-Clapeyron, heat/mass transfer, geothermobarometry, charnockite/skarn, P-T-t.
• Geodynamics: discontinuities/Vp-Vs-density/Moho, rheology, rock magnetism, reversals/polar wandering/supercontinent, drift/spreading, anomalies/plumes/plate boundaries/heat flow.

Main Geology Paper-III

• Economic Geology: ore minerals/textures/paragenesis, syngenetic/epigenetic/stratiform, magmatic/pegmatitic/hydrothermal/sedimentary/supergene/metamorphic deposits, fluid inclusions/stable isotopes/tectonics.
• Indian Mineral Deposits & Mineral Economics: major Indian deposits, industrial/strategic/critical minerals, production/co-products/by-products, conservation, National Mineral Policy, Mineral Concession Rules, marine resources/law of sea.
• Mineral Exploration: stages, geological/geochemical/geobotanical, pitting/trenching/drilling/sampling/assaying/reserves and geophysical methods.
• Fuel & Engineering Geology: coal, petroleum, Uranium, engineering properties/investigations for dams/reservoirs/tunnels/bridges/highways/coastal structures.
• Environmental Geology & Natural Hazards: climate/radiation/greenhouse/carbon, nuclear waste, coastal systems, ozone/ocean acidification/coral/Milankovitch/sea level/eutrophication/acid rain, anthropogenic impacts, glaciers, earthquakes/volcanoes/tsunami/floods/landslides/coastal erosion/drought/desertification, RS/GIS.

Main Hydrogeology

• Occurrence & Distribution of Groundwater.
• Groundwater Movement & Well Hydraulics.
• Water Wells & Groundwater Levels.
• Groundwater Exploration.
• Groundwater Quality & Management.
• Official subtopics include water cycle/budget/residence time, aquifers/porosity/specific yield, Darcy flow/conductivity/transmissivity, steady/unsteady well flow, pumping/slug tests, geophysical exploration/logging, groundwater chemistry, sea-water intrusion, waste plume, isotopes, artificial recharge and basin management.

Main Geophysics Paper-I

• Solid Earth Geophysics; Earthquake Seismology; Mathematical Methods in Geophysics; Geophysical Inversion; Mathematical Methods of Physics; Electrodynamics; Electromagnetic Theory; Introductory Atmospheric & Space Physics.
• Includes geoid/isostasy/thermal history, paleomagnetism, seismicity/fault-plane solutions/tomography/networks, gravity/electrical/magnetic field equations, inversion/SVD/Gauss-Newton/Monte-Carlo/Bayesian/genetic/simulated annealing, special functions/Fourier/PDE/complex analysis, EM potentials/plasma/MHD, Maxwell/Fresnel/waveguides, atmosphere/ionosphere/GPS.

Main Geophysics Paper-II

• Potential Field Gravity/Magnetic Methods; Electrical & Electromagnetic Methods; Seismic Prospecting; Borehole Geophysics; Classical Mechanics; Thermodynamics & Statistical Physics; Atomic/Molecular Physics & Material Characterization; Nuclear & Particle Physics.
• Includes anomaly reduction/separation/RTP/Euler, DC resistivity/VES/ERT/SP/IP/EM/MT/GPR, CDP seismic/NMO/DMO/Dix/migration/VSP, petrophysical logs/Archie/Humble, Lagrangian/Hamiltonian, ensembles/quantum statistics, spectroscopy/SEM/TEM/ESR/NMR/Mössbauer, nuclear models/reactions/particles/symmetry.

Main Geophysics Paper-III

• Radiometric & Airborne Geophysics; Marine Geophysics; Geophysical Signal Processing; Remote Sensing & Geohydrology; Solid-State Physics & Basic Electronics; Laser Systems; Digital Electronics/Radar/Satellite Communication; Quantum Mechanics.
• Includes airborne gravity/magnetic/EM/radiometric, marine survey/OBS/bathymetry/navigation, FFT/Hilbert/Z-transform/digital filters, remote sensing/aquifer flow, semiconductor/superconductivity/optoelectronics, laser cavity/Q-switch/mode-lock/fibres, digital logic/microprocessors/radar/satellite, Schrödinger/perturbation/WKB/scattering/Klein-Gordon/Dirac.

Main Chemistry Paper-I – Inorganic Chemistry

• Inorganic Solids; Coordination Compounds; Acid-Base Titrations; Gravimetric Analysis; Redox Titrations; Complexometric Titrations; Organometallic Compounds; Nuclear Chemistry; d- and f-Block Chemistry.
• Includes defects/material synthesis/complex oxides/frameworks, CFT/Jahn-Teller/spectra/magnetism, acid-base curves/indicators, precipitation chemistry, Nernst/redox methods, EDTA/masking, 18-electron rule/Wilkinson, radioactivity/detectors, transition/lanthanide chemistry.

Main Chemistry Paper-II – Physical Chemistry

• Kinetic Theory/Gaseous State; Solids; Chemical Thermodynamics & Equilibrium; Chemical Kinetics & Catalysis; Electrochemistry; Quantum Chemistry; Spectroscopy; Photochemistry.
• Includes real gases/van der Waals/criticality, crystal systems/XRD, fugacity/activity/van’t Hoff/Debye-Hückel, rate theories/adsorption/BET/colloids, cells/Nernst/potentiometry, particle-in-box, rotational/vibrational/Raman, Franck-Condon/fluorescence/phosphorescence/quantum yield.

Main Chemistry Paper-III – Analytical & Organic Chemistry

• Errors in Quantitative Analysis; Separation Methods; Spectroscopic Methods; Thermal Analysis; X-Ray Analysis; ICP Spectroscopy; Geological Material Analysis; Unstable Intermediates; Addition Reactions; Carbonyl Reactions; Oxidation/Reduction; Electrocyclic/Pericyclic Reactions; IR/UV/NMR/Mass Spectrometry.
• Includes Q/t/F tests/control charts, chromatography/HPLC/GLC/solvent extraction, UV-Vis/IR/AAS, TG/XRD/XRF/ICP, ores/alloys/petroleum/coal analysis, carbenes/nitrenes, Diels-Alder/polymerisation, named carbonyl reactions, Birch/Wolff-Kishner/Sharpless, Woodward-Hoffmann/FMO/Norrish/sigmatropic and spectroscopy details.

1. UPSC Online Application Portal पर Account Creation, URN और Common Application Form (CAF) complete करें।
2. Combined Geo-Scientist Examination 2027 का Exam Specific Module खोलकर eligible stream/post preference, centre और required details/documents भरें।
3. Uploaded photograph के साथ live photograph capture करें; plain white paper पर black ink से तीन signatures one-below-another करके upload करें; applicable fee जमा करें।
4. Final submission से पहले सभी details verify करें और URN/Application Number सुरक्षित रखें।

• Aadhaar use करने की UPSC ने strongly advise किया है।
• Government/Public Enterprise employees को अपने Head of Office/Department को application की written information देनी होगी।