Paper II
Section A

In about 200 words each, explain any three of the following:

Double refraction and birefringence 20

Textures in volcanic rocks: Petrogenetic significance 20

Retrograde metamorphism: The assemblage minerals, textures and their significance 20

Ripples, Dunes and cross-breeding: Origin and significance of Phosphate group of minerals. 3. Write explanatory notes on the following: Characteristics. 30 indicators to identify different source rocks. 60

Define provenance and its importance in Sedimentology. Describe the provenance

Stratabound and stratiform deposits: Characteristics and examples. 20

Heavy media separation as ore-dressing process

Isomorphism and isomorphous mixture, examples.

Fertilizers/and their impact on groundwater pollution

Describe the chemical composition, physical properties and mode of occurrence

Carbonatities; their mode of occurrence, petrography and petrogenesis. 30

Granulite terrains of India: Their mineral assemblages and petrogenetic

Section B

In about 200 words each, write notes on any three of the following:

Write notes on the following, in brief:

Pyrometasomatic deposits: Their genesis and general characteristics. 30

Placer deposits of thorium in India: Their geological setting and mode of

Describe the methods of geological prospecting giving their applications and limitations. Add a note on geobotanical prospecting methods.

Write notes on the following, in brief:

Goldschmidt's geochemical classification of the elements with examples.

Legislative measures for environmental protection in India.