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Common Entrance Examination for Admission to P.G. Courses underCSS 2009

GEOLOGY

Time: 2 Hours Max. Marks: 100Instruction

Questions under all Parts are to be answered in the booklet itself.

Time: 1 Hour Marks: 50

PART – I

Answer all questions choosing the most appropriate answer. No negative marks :

1. Powder colour of the mineral is calleda) Streak b) Lusterc) Tarnish d) Pleochroism

2. Mineral with six directional cleavagesa) Beryl b) Galenac) Sphalerite d) Fluorite

3. The device used to measure the Birefringence of the minerala) Bereck Compensator b) Quartz Wedge

c) Gypsum Plate d) Bertrand Lens

4. Which one of the following is an ortho-pyroxene ?a) Hypersthene b) Augitec) Diopside d) Acmite

P.T.O.

To be filled in by the candidate

RegisterNumber

In figures

In words

5. An over turned fold with horizontal axial planea) Conjugate fold b) Recumbent foldc) Fan fold d) Chevron fold

6. Rubellite is a verity of

a) Tourmaline b) Ruby

c) Beryl d) Rutile

7. Mineral with maximum extinction angle in oriented thin section

a) Hornblende b) Diopside

c) Augite d) Agate

8. Peritectic temperature of Olivine-Pyroxene conversion is at

a) 1553°C b) 1557°C

c) 1889°C d) 1274°C

9. The volcanic equivalent Nepheline Syenite is

a) Trachyte b) Andesite

c) Phonolite d) Nephelinite

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10. Spinifex texture is common ina) Komatiite b) Limburgitec) Lherzolite d) Commendite

11. Feldspathic sandstone is called

a) Breccia b) Arkose

c) Greywack d) Ganister

12. Calcareous clay is known as

a) Bentonite b) Marl

c) Guano d) Caliche

13. Nematoblastic texture is characteristic of

a) Amphibolite b) Basalt

c) Carbonotite d) Dolerite

14. The intergrowth texture produced between Quartz and Sodic plagioclase is

a) Symplectitic b) Eutaxitic

c) Myrmekitic d) Perthitic

15. A rock found in subduction zone with Almandine and Omphacite

a) Ophiolite b) Spilite

c) Eclogite d) Melanche

16. Which one of the following fossils is bivalved, equivalved and inequilateral ?

a) Turritella b) Turrilites

c) Terebratula d) Trigonia

17. Which one of the following is not related to oil fields of Assam ?

a) Digboi b) Lakwa

c) Moran d) Ankaleswar

18. Plumbago is another name for

a) Stibnite b) Molybdenite

c) Cinnabar d) Gaphite

19. Pick out the copper ore mineral that do not occur as supergene enrichmenta) Chalcopyrite b) Bornitec) Chalcocite d) Cuprite

20. Example of iron ore deposit formed by early-magmatic injectiona) Bendigo-Australia b) Sudbury-Canadac) Kiruna-Sweden d) Singbhum-India

21. The Earth’s seismic shadow zone is falling between

a) 103° and 143° b) 103° and 144°

c) 103° and 134° d) 103° and 133°

22. Stratigraphically a non marine formation

a) Karewa formation b) Umaria bed

c) Uttathur formation d) Valudavur bed

23. The primitive cephalopod

a) Ammonites b) Belemnites

c) Ceratite d) Desmocerus

24. Quartz bearing syenite is called

a) Nordmarkite b) Pulaskite

c) Larvikite d) Shonkinite

25. Leucotonalite is called

a) Trondhjemite b) Adamellite

c) Charnockite d) Enderbite

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26. Pick out the Brachiopod

a) Arca

b) Physa

c) Nautilus

d) Spirifer

27. Arrange the following fossils according to their age from older to younger :(I) Pliopithecus (II) Monograptus (III) Pardoxides (IV) Ceratites

a) I, II, III, IV

b) III, IV, II, I

c) III, II, IV, I

d) I, IV, II, III

28. Water intertrapped in sediments during their deposition is called

a) Connate b) Juvenile

c) Meteoric d) Spring

29. The lower and middle Triassic deposits were dominated by ammonoids of

a) Goniatite suture b) Ceratite suture

c) Nautiloid suture d) Ammonitic suture

30. Pardoxides is an example of

a) Protoparian b) Hypoparian

c) Opisthoparian d) Proparian

31. The Ordovician is known as the age ofa) Brachiopods b) Dinosaursc) Fishes d) Graptolites

32. Which of the following is not of marine habitat ?

a) Pelecypods b) Cephalopods

c) Crinoids d) Brachiopods

33. Joints which are parallel to the axial planes of folds are described as

a) Extension Joints b) Release Joints

c) Cross Joints d) Columnar Joints

34. A reverse fault dipping less than 45° is known as

a) Overthurst b) Underthurst

c) Upthurst d) Thurst

35. Pahoehoe is a type of

a) Ropy Lava b) Blocky Lava

c) Migma d) Magma

36. Pyroxene is a

a) Single Chain Silicate b) Double Chain Silicate

c) Sheet Silicate d) Orthosilicate

37. Pick out the Lead Carbonate from the following ores

a) Galena b) Cerussite

c) Anglesite d) Smithsonite

38. Among the following, which mineral has highest specific gravity ?

a) Baryte b) Chromite

c) Cinnabar d) Galena

39. The mineral epidote is formed due to the process of

a) Serpentinisation b) Saussuritisationc) Sericitisation d) Kaolinisation

40. The line joining the points of equal atmospheric pressure is called

a) Isohyets

b) Isobars

c) Isotherms

d) Isochron

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41. Fossils of Dinosaurian excreta are called

a) Coprolites b) Oolites

c) Guano d) Diatom

42. Hornfelsic rocks are characteristically formed due to

a) Regional Metamorphism

b) Contact metamorphism

c) Cataclastic Metamorphism

d) Plutonic metamorphism

43. Gold deposit of Bendigo in Australia is an example of

a) Stock Work b) Ladder Vein

c) Saddle Reef d) Box Work

44. The device used to measure the hardness of a mineral is called

a) Sclerometer b) Goniometer

c) Clinometer d) Pedometer

45. Swallow-tail twinning is characteristic of

a) Gypsum b) Rutile

c) Staurolite d) Magnetite

46. Pick out the twinning law that is not shown by Quartz

a) Brazillion law b) Dauphine law

c) Japanese law d) Pericline law

47. Which one of the following crystal forms has (hll) symbol ?

a) Trisoctahedron

b) Trapezohedron

c) Tetrahexahedron

d) Hexoctahedron

48. Crystals of quartz are best examples of

a) Hemimorphism

b) Hemihedrism

c) Enantiomorphism

d) Holohedrism

49. Which of the following is not a mantle rock ?

a) Lherzolite

b) Peridotite

c) Chondrite

d) Eclogite

50. Plagioclase crystals are exhibiting

a) Dimorphism

b) Polymorphism

c) Isomorphism

d) Pseudomorphism

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ANSWER SHEET – PART – I

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GEOLOGY

Time: 1 Hour Marks: 50

PART – II

Answer any ten questions in the space provided. All questions carry equal marks.(10× 5=50 Marks)

I. Explain Nebular hypothesis.

II. List the causes and evidences of sea level changes.

III. Outline the global distribution of Volcanoes and Earthquakes.

IV. Give the axial characters and symmetry elements of normal class of cubic system.

V. Distinguish between Pyroxenes and Amphiboles.

VI. State Brewster’s Law and explain double refraction.

VII. Write the stratigraphic succession of Cuddapah System.

VIII. Sketch and lable the parts of Murex and Arca.

IX. How do you recognize folds in the field and on a map ?

X. Differentiate the faults from unconformities.

XI. What are Gossans ? How are they used in mineral explorations ?

XII. Bring out the conditions prevailing during Eutectic and Peritectic crystallization.

XIII. Enlist the various bases considered during the classification of igneous rocks ?

XIV. Briefly write the Mineralogy and Texture of Arkose and Phyllite.

XV. Comment up on the mineral wealth of Kerala.

P.T.O.

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