Description
Tutor Marked Assignment
PETROLOGY
Course Code: BGYCT-135
Assignment Code: BGYCT-135/TMA/2023
Maximum Marks: 100
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Note: * Attempt all questions. The marks for each question are indicated against
it. Write all answers in your own words; do not copy from the course
material.
* Write the answers in about 250 words for 5 marks questions and not
exceeding 500 words for 10 marks questions.
Part A
1. Write short notes on the following:
a) Rock cycle (5)
b) CIPW classification (5)
2. Discuss the different types of structures found in igneous rocks with the
help of neat well labelled diagrams.
(10)
3. Explain the chemical and mineralogical composition of magma in detail. (10)
4. Discuss the megascopic and microscopic characters of granodiorite
with the help of neat well labelled diagrams.
(10)
5 Explain Bowen’s reaction series. (10)
Part B
6. Explain the processes that are involved in the formation of sedimentary
rocks.
(10)
7. Discuss the effects of packing of grains on the porosity and
permeability of rocks.
(10)
8. Discuss in brief the factors affecting metamorphism. (10)
9. Write short notes on the following:
a) Grain size parameters (5)
b) Graded Bedding (5)
c) Palimpsest Texture (5)
d) Foliation and lineation (5
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