Geology CSS Paper I 2008

FEDERAL PUBLIC SERVICE COMMISSION
COMPETITIVE EXAMINATION FOR RECRUITMENT TO POSTS
IN BPS – 17 UNDER THE FEDERAL GOVERNMENT, 2008.

GEOLOGY, PAPER – I
TIME ALLOWED: PART I 30 MINUTES MAXIMUM MARKS 20
PART II 2 Hours & 30 Minutes MAXIMUM MARKS 80
NOTE: (i) First attempt PART I (MCQ) on separate Answer Sheet which shall be taken back after 30 minutes.
(ii) Overwriting / cutting of the options / answers will not be given credit.

PART – I (MCQ) (COMPULSORY)
Q.1 Select the best option /answer and fill in the appropriate box on the Answer Sheet. (20)
(1) Oligomictic conglomerate is made up of
(a) Angular clasts (b) Rounded clasts (c) Clasts of same composition (d) Clams of same size
(ii) Biomicrite is made up of
(a) Sand sized grains (b) Fossil fragments and lime mud (c) Reef rock
(iii) Graywake is made up of:
(a) Mostly gravel (b) Mostly sand (c) Sand with 25% fledspar (d) Sand with 25% quartz
(iv) A rock made of fine grained pyroclastic particles is called:
(a) Rhyolite (b) Basalt (c) Tuff (d) None of these
(v) Aeolian rocks are deposited through:
(a) Water (b) Glacier (c) Wind (d) Volcanic eruption
(vi) Colour of a mineral suggests its quality of:
(a) Absorption (b) Reflection (c) Transmission (d) Refraction
(vii) Luster of a mineral suggests its quality of _____ of light waves:
(a) Absorption (b) Reflection (c) Transmission (d) Refraction
(viii) Felsic igneous rocks contain more than 65% Silica.
(a) True (b) False
(ix) Acid igneous rocks contain more than 65% Silica:
(a) True (b) False
(x) Per aluminous rocks contain:
(a) Excess aluminum (b) Little aluminum (c) 50% aluminum (d) 10% aluminum
(xi) An igneous rocks mostly made up of the olivine is called as:
(a) Gabbro (b) Olivine rich gabro (c) Peridotite (d) None of these
(xii) Highly viscous magma will cause ____ volcanic eruption:
(a) Less explosive (b) More explosive (c) Quiet (d) None of these
(xiii) Slaty cleavage in rocks is developed through:
(a) Deposition of flaky minerals (b) Metamorphism (c) Seismic activity (d) Atmospheric changes
(xiv) Migmatite is produced under:
(a) High temperature (b) Low temperature (c) High pressure (d) Both (a) and (c)
(xv) Presence of Kayanite in a metamorphic rock suggests grade of metamorphism:
(a) Low (b) Intermediate (c) High (d) Impurities
(xvi) Glaucophane is a typical mineral present in:
(a) Horzburgite (b) Gabbro (c) Blue Schist (d) None of these
(xvii) Kalabagh Fault is an example of:
(a) Thrust fault (b) Transpressional fault (c) Strike slip fault (d) None of these
(xviii) Trilobite trace fossils are reported from stratigraphic sequence of Pakistan:
(a) Mesozoic (b) Paleozoic (c) Paleogene (d) None of these
(xix) Glossapteris and Gangassepteris are:
(a) Plant fossils (b) Fauna living in deep sea (c) Extinct mammals (d) Both (a) and (c)
(xx) Authigenic Sedimentary Rocks are:
(a) Intrabisinal (b) Extrabasinal (c) Both (a) & (b) (d) None of these

PART II
Note:
(i) PART II is to be attempted on the separate Answer Book.
(ii) Attempt ONLY FOUR questions from PART II. All questions carry EQUAL marks. Illustrate your answer wherever necessary.
(iii) Extra attempt of any question or any part of the attempted question will not be considered.

Q.2. What is a Volcano? Where arc Volcanoes located on Earth? What are different types of Volcanic Eruptions? Where does Calk-Alkaline magmatism occur? (20)
Q.3. Describe the Stratigraphy of Oceanic Crust? (20)
Q.4. What is a Fossil? What arc various requirements for the preservation of fauna and flora in rocks? (20)
Q.5. What are various common rock-thrming minerals of the Earth’s Crust? Briefly describe their composition and structure. (20)
Q.6. What is meant by Metamorphism? What are various agents / factors of Metamorphism? (20)
Q.7. What is a Bed Form? Describe the variety of Bed Forms produced under varying conditions of Flow Regime? (20)
Q.8. Briefly describe the classification of Metamorphic Rocks. (20)