Rajasthan Public Service Commission
RAS Pre-Syllabus: Geology (Code No. 16)
I. Physical Geology and Geomorphology :
Solar system, the earth, its origin, age and internal constitution.
Weathering and erosion. Geological work of river, glacier, wind, ocean and
ground water. Types, products and distribution of volcanoes. Causes, effects and
distribution of earthquakes.
Morphology of continents and oceans. Elementary idea of isostasy, continental
drift, sea floor spreading and plate tectonics. Iceages, past climates and coral
reefs. Land forms, their types and relation to lithology and deformation
Geomorphological sub division of India.
II. Structural Geology and Geotectonics and Structure and Tectonics of
Dip, strike, pitch and plunge; Clinometer Compass. Determination of top of
beds. Description and classification of folds, faults, unconformities and
joints. Cleavage, schistosity, foliation and lineation. Igneous intrusives and
extrusive bodies. Overlap, offlap, outliers and inliers. Major tectonic sub
divisions of India and their characteristics. Origin of Himalayas, Indoganetic
plains and deserts in India.
III. Palaeontology, Principles of Stratigraphy and Geology of India :
Mode of preservation and utility of fossils. Elementary idea of organic
evolution. Morphology and geological distribution of Graptoloidea, Echinoidea,
Gastropoda, Lamellibranchia, Trilobita, Brachiopoda, Cephalopoda and
A brief study of Gondwana plant fossils and Siwalik fauna; elementary; idea
of evolution of man, elephant and horse, Standard stratigraphic time scale,
principles of stratigraphic correlation and knowledge of stratigraphic
Study of Precambrian, Palaeozoic Mesozoic and Cenozoic rocks of India.
IV. Crystallography and Mineralogy :
Law of crystallography, elements of crystal symmetry, crystallographic
notations and twining. Study of forms and symmetry elements of normal classes of
various crystal systems. Contact goniometer. Crystal bonding and internal
structure of crystals.
Physical, chemical and optical characteristics of important silicate mineral
groups. viz., Quartz, Felspar, Felspathoid, Olivine, Pyroxene, Amphibole, Mica,
Chloride and Garnet. Structure of silicate minerals. Physical properties and
chemical composition of important ore minerals. Petrological microscope, micol
prism, birefringence, pleochroism, extinction, uniaxial and biaxial
characteristic of minerals. Optical signs.
V. Igneous, Sedimentary and Metamorphic Petrology :
Composition of magmas. Forms, structure, textures and classification of
igneous rocks. Phase rule, crystallisation of unicomponent and bicomponent
silicate melts. Crystallisation of common basaltic magma. Bowen's reaction
series, magmatic differentiation and assimilation. Petrography and petrogenesis
of common igneous rocks.
Sedimentary processes, lithification and diagenesis. Heavy minerals.
Structures, textures, classification and depositional environment of sedimentary
rocks. Physical parameters of sedimentary grains. Petrography and petrogenesis
of important sedimentary rocks.
Agents, kind, depth zones, facies and grades of metamorphism. Structures,
textures and classification of metamorphic rocks. Petrography and petrogenesis
of important metamorphic rocks.
VI. Economic Geology and Applied Geology :
Processes of formation of mineral deposits. Mode of occurrence, distribution,
uses and origin on important metallic and nonmetallic mineral deposits of India.
Coal, petroleum and radioactive minerals deposits of India.
Elementary idea of various geophysical methods of prospecting. Elements of
Ground Water Geology and Engineering Geology. Surveying instruments and their
use.Elementary knowledge of mineral dressing. Application of
VII. Geology and Mineral Wealth of Rajasthan :
Lithostatigraphic divisions, tectonic and structural features of the geology
of Rajasthan. A study of the geology of Rajasthan from Precambrians to Recent.
Mineral wealth of Rajasthan and the mineral based industries. Knowledge of major
mining regions, dams, reservoirs, engineering projects, hydroelectric projects,
thermal power plants, fuel resources and ground water potential of the State of
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