Download SGBAU BSc 2019 Summer 2nd Sem Geology Old Question Paper

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B.Sc. (Part—I) Semester—II Examination

GEOLOGY (Old) (Upto Summer—2019)

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Time : Three Hours] [Maximum Marks : 80

Note :— (1) Question No. 1 is compulsory.

(2) Solve total seven questions.

(3) Draw well labelled diagram wherever necessary.

1. (A) Fill in the blanks :
   1. Twinkling effect is best shown by the mineral —_____ under plane polarised light.

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   2. Bowen’s reaction series is divided into - — and — series.
   3. Suture are the characteristic of Phyllum — .
   4. The valuable economical mineral diamond occurs in - super group. 2

1. (B) Choose the correct answer :
   1. The light vibrates only in one plane called as :
      1. Ordinary light

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      2. Polarised light
      3. White light
      4. None of above
   2. The rock with higher percentage of felsic minerals are called as :
      1. Leucocratic

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      2. Mesocratic
      3. Melanocratic
      4. All of above
   3. The common rocks found in Archean super group are :
      1. Igneous Rocks

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      2. Sedimentary Rocks
      3. Metamorphic Rocks
      4. None of above
   4. The two valves of Brachiopod shell are joined together along a line reffered to as :
      1. Radial line

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      2. Hinge line
      3. Straight line
      4. None of above
   ro

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1. (C) Answer in one or two sentences :
   1. What is plecochroism ?
   2. What is reflection and refraction ?
   3. What are Rain print ?
   4. What is dextral coiling ? -+
   ro

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2. Describe the various optical properties of Mineral under plane polarised light.

   OR

   What is polarising microscope ? Describe in detail, the parts and function of polarising microscope. 12
3. Explain the following :
   1. Physical properties of olivine.
   2. Optical properties of Hornblende.
   3. Mode of occurrence of Garnet

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   OR

   1. Physical properties ol Muscovite.
   2. Optical propertics of Feldspar.
   3. Mode of occurrence of Pyroxene.

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4. Describe the following :
   1. C.I.P.W. classification.
   2. Basic Igneous rocks.
   3. Discontinuous Reaction series.

   OR

   1. Tabular classification of Igneous rocks.

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   2. Acidic Igneous rock.
   3. Granite-Granodiorite. 12
5. Explain the following :
   1. Non-clastic texture.
   2. Current bedding.

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   3. Schistose structure

   OR

   1. Granulose texture.
   2. Slate.
   3. Classification of metamorphic rocks 12

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6. Describe the following :
   1. Suture of cephalopods.
   2. Classification of Brachiopoda.
   3. Geological history of Lamellibranchia.

   OR

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   1. Dentition in Lamellibranchia
   2. Morphology of Brachiopoda
   3. Geological history of Gastropoda. 12
7. Describe the classification, geological distribution, lithological characters, fossil content and economic importance of Vindhyan super-group.

   OR

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   Describe the classification, geological distribution, lithology and fossil content and economic importance of Dharwar-Super group. 12

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