B.Sc-B.Sc Geology 2nd Sem PALAEONTOLOGY AND GENERAL(Alagappa University, Karaikudi, Tamil Nadu-2011)

B.Sc. DEGREE EXAMINATION, APRIL 2011
Second Semester
Geology
PALAEONTOLOGY AND GENERAL
STRATIGRAPHY
(Non-CBCS—2004 onwards)
Time : 3 Hours Maximum : 100 Marks
Section A (10 × 2 = 20)
Answer all the questions.
1. What do you understand by ‘Petrification’ ?
2. What is an Index fossil ? Give an example.
3. Mention the Geological age for Zaphrentis and Stigmatopygus.
4. Explain ‘theca’ and ‘epitheca’.
5. Give the Geological age for Exogyra and Rhynconella.
6. What are ‘Pallial line’ and ‘Pallial sinus’ ?
7. Mention the Geological age for Calymene and Tetragraptus.
8. Give the Geological age for Glossopteris and Ptilophyllum.
9. Mention any two principles of Stratigraphy.
10. Explain the term ‘Homotaxis’.
Section B (5 × 7 = 35)
Answer all the questions.
11. (a) Briefly explain the various methods of preservation of fossils.
(Or)
(b) Give the stratigraphic importance of the following:
(i) Foraminifera.
(ii) Sponges.
12. (a) Give a brief account of the classification of Phylum Echinodermata.
(Or)
(b) With neat sketches, describe briefly the following fossils :
(i) Lithostrotion.
(ii) Pentremites.
13. (a) List out the distinguishing characters between Pelecypoda and Brachiopoda.
(Or)
(b) With neat sketches, describe the following fossils :
(i) Pecten.
(ii) Ceratites.
14. (a) Describe briefly about the classification of Trilobites.
(Or)
(b) With neat sketches, describe the various forms and arrangement of rhabdosome and theca in Graptolites.
15. (a) What is ‘Correlation’ ? Mention the different methods of Correlation.
(Or)
(b) Give a brief account on the laws of stratigraphy.
Section C (3 × 15 = 45)
Answer all questions.
16. (a) Give an elaborate account of the different uses of Fossils.
(Or)
(b) Draw a neat diagram of a Corallite showing the outer and inner views. Label the different parts.
17. (a) Draw a neat diagram of a Gasteropod Shell showing the morphological features. Add a note on the various forms of Gasteropod shells.
(Or)
(b) With neat sketches, describe the following fossils:
(i) Tetragraptus.
(ii) Paradoxides.
(iii) Productus.
18. (a) Give a brief outline on the classification of plant kingdom and describe the following plant fossils :
(i) Sigillaria.
(ii) Glossopteris.
(Or)
(b) Give an elaborate account on the stratigraphic classification of Geological records.

Earning:  ₹ 6.05/-