IAS Mains Geology 2001
Paper I
Section A

Answer any three of the following each within 200 words:

Why are modern island arcs restricted to specific parts of the globe? How would you identify island arc products in ancient rocks records?

Which earth processes control the drainage geomorphology?

Explain the basic principles of Global Positioning System.

Explain the mechanism of rock failure leading to faulting.

It is said: While new ocean floor is born, old ocean floor dies. Explain.

Describe:

Development of coastal landforms.

Remote sensing techniques for identification of rock types (30 × 2 60).

Write brief notes on:

Reversal of dips

Nappe

Inlier and Outlier

Paraconformity (15 × 4 60)

Section B

Answer any three of the following, each within 200 words: (20 × 3 60)

Differentiate between body fossil and trace fossil.

Fossil fauna and flora can indicate paleoclimate. Justify in the Indian context.

Where do the, names ‘Umarja and’ Umia arise in the context of Indian stratigraphy?

Describe the role played by the hydrogeological studies in the welfare of human civilization

Write brief notes on: (15 × 4 60)

Benthic Foraminifera

Brachial skeleton of fossil brachiopods

Exoskeleton of trilobites

Neanderthal man

Answer the following: (15 × 4 60)

On which age level (in million years) is the Precambrian-Cambrian boundary placed? What are Cambrian fauna? Are they found in the Indian subcontinent and if so, where?

Enumerate characteristic features of Jurassic ammonoids of Kutch basin.

Trace the evolutionary history of Eastern Chats Mobile Belt.

What was the paleogeographic disposition of continents during the Permo-Carboniferous era?

Comment on: (30 × 2 60)

Problem of salt-water intrusion in coastal areas and remedial measures.

Geological considerations in dam construction