M.Sc. DEGREE EXAMINATION, APRIL 2017
Second Semester
Applied Geology
IGNEOUS AND METAMORPHIC PETROLOGY
(2016 onwards)
Time 3 Hours Maximum 75 Marks
Section A (10 x 2 20)
Answer all the questions.
All questions carry equal marks.
1. Define ophitic texture.
2. Define spherulitic structure.
3. What are acid igneous rocks? Give two examples.
4. What are alkaline igneous rock? Give an example.
5. List out any four factors that control metamorphism.
6. Define schistose structure.
7. Define retrograde metamorphism.
8. Define hornfels.
9. Define reflectance spectra of rocks and minerals.
10. Mention any two expressions of igneous rocks that can be
used for their identification in aerial photographs.
Sub. Code
464201
RW-092
2
Sp 1
Section B x 5 25)
Answer all the questions, choosing either or
11. Write short notes on the crystallization of basaltic
magma.
Or
Discuss the salient features of unicomponent
magma.
12. Discuss the salient features of reaction principle.
Or
Write short notes on petrogenesis of pegmatites.
13. Explain the classification metamorphic rocks.
Or
Describe briefly the metamorphic textures.
14. Write an account on the petrogenesis of
amphibolites.
Or
Give an account on mineralogical phase rule.
15. Write short notes on spectral properties of minerals.
Or
Discuss about the factors which influence the
reflectance spectra of rocks and minerals.
RW-092
3
Sp 1
Section C x 10 30)
Answer any three questions.
All questions carry equal marks.
16. Describe the forms of igneous rocks with neat diagrams.
17. Describe the microtextures of igneous rocks with neat
diagrams.
18. Write a detailed account on the petrography of gneisses
and schists.
19. Elaborate on the various facies of metamorphism.
20. Describe the expressions of igneous and metamorphic
rock in satellite data that would aid their identification.
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