IAS Mains Geology Papers 1996

IAS Mains Geology 1996

Paper I

Section A

  1. Explain any three of the following in about 200 words each:

    1. Island Arcs

    2. Atolls and Reefs

    3. Isostasy

    4. Unconformities

  2. Comment on the classification of folds, Illustrate your answer with neat sketches.

  3. Write brief notes:

    1. Stalactites and Stalagmites

    2. Antecedent drainage

    3. Piedmont glacier

    4. Yardangs

    5. Tombolo

  4. Trace the evolution of the Plate Tectonic theory and describe its main features.

Section B

  1. Answer any three of the following in about 200 words each:

    1. Classification of the Gondwanas

    2. Cretaceous-Eocene boundary

    3. Sausar Group

    4. Siwalik sedimentation

  2. Draw neat labelled diagrams to illustrate the morphology of Echinoids. Tabulate the distinction between Regular and Irregular Echinoids. Add notes on their distribution in time.

  3. Write detailed notes on:

    1. Inter-trappeans and their importance in Stratigraphy

    2. Himalayan uplift

    3. Marine transgression in Permocarboniferous

  4. What is Stratigraphy? Discuss the principles of stratigraphic correlation. Also briefly explain the basis of reconstruction of standard stratigraphic scale.

Paper II

Section A

  1. Write notes on any three of the following in about 200 words each:

    1. Isomorphism

    2. Space-lattices

    3. Crystallographic notation

    4. AEM diagram

  2. Describe Garnet group of minerals.

  3. Summarize the behaviour of light in biaxial crystals.

  4. Give an account of the classification of igneous rocks.

Section B

  1. Write notes on any three of the following in about 200 words each:

    1. Magnetic methods of ore dressing

    2. Atomic minerals

    3. Guides to ore deposits

    4. Open stopes

  2. Give an account of the chromite deposits of India.

  3. Describe geophysical methods of exploration.

  4. Briefly discuss application of geological knowledge in various engineering works.