This download link is referred from the post: SGBAU BSc Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university
B.Sc. (Part—I) Semester—II Examination
GEOLOGY (New)
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(Igneous, Sedimentary and Metamorphic Petrology)
Time : Three Hours] - [Maximum Marks : 80
Note :— (1) All the questions are compulsory.
(2) Draw well labelled diagrams wherever necessary.
- (A) Fill in the blanks :
- Rocks crystallized at great depth are called — Igneous rocks.
- Thermal metamorphism is due to a factor.
- —— is deposits built at mouth of streams usually triangular in shape.
- The felsic minerals in igneous rock are — color and in density.
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- (B) Choose the correct alternatives :
- The silica content is less than 45 % then rock is known as :
- Basic rock
- Ultrabasic rock
- Intermediate rock
- Acidic rock
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- Gneiss is :
- Igneous rock
- Sedimentary rock
- Metamorphic rock
- Ore
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- Why basalt is fine grained than gabbro ?
- Basalt has mafic composition
- Gabbro has mafic composition
- Basalt formed from quick cooling of magma
- Gabbro formed from quick cooling of magma
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- The particles or grain size of gravel :
- 0.1 mm to 2 mm
- More than 2 mm
- Less than 1 mm
- 0.01 to 0.1 mm
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- The silica content is less than 45 % then rock is known as :
- (C) Answer the following in one or two sentences :
- What is metamorphic rock ?
- What is rudaceous rock ?
- What is delta formation ?
- What is phase rule ?
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- What is texture ? Describe in detail the various textures in igneous rock. 12
OR
What is igneous rock ? Describe in detail the structures in igneous rock. 12
- Explain the following :
- Mineralogical character of basalt. 4
- Assimilation. 4
- Tabular classification of igneous rock. 4
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OR
- Discontinuous reaction series. 4
- Characteristic of felsic and mafic minerals. 4
- Fractional crystallization. 4
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- Describe in detail ternary system of diopside, albite and anorthite. 12
OR
Describe in detail one component system of augite and quartz. 12
- Explain the following :
- Flood plain deposits. 4
- Stratification. 4
- Clastic sedimentary rocks. 4
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OR
- Graded Bedding. 4
- Types of dunes. 4
- Non-clastic sedimentary rocks. 4
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- Explain the following :
- Dynamic metamorphism 4
- Palimpsest or relict texture, 4
- Maculose structure. 4
OR
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- Thermal metamorphism. 4
- Agents of metamorphism. 4
- Foliated and non-foliated metamorphic rock. 4
- Explain the following
- Conglomerate. 4
- Autometamorphism. 4
- Organic deposits of sedimentary rock. 4
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OR
- Stress and anti-stress minerals 4
- Limestone. 4
- Hornblende schist. 4
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This download link is referred from the post: SGBAU BSc Last 10 Years 2010-2020 Question Papers || Sant Gadge Baba Amravati university