IAS Mains Geology 2000
Paper I
Section A

Write short answers (within 200 words) for any three of the following:

What is the principle of dating very old rocks on the Earth?

Define Peninsula and Extra-peninsula with reference to India.

What do you understand by Geomorphic cycles?

Draw a stress and strain ellipsoid for a deformed rock.

Differentiate between:

Hawaiian and Strombolian type volcanic eruptions

Mobile belts and shields

Lower mantle and Upper mantle

Primary and Secondary seismic waves

Describe the steps through which present configuration of the Earth Have evolved. Discuss the most recent view, in this regard.

Briefly describe the following:

Mid-Atlantic Ridge

Origin of oceans and continents

Fluvial landforms

Monocline and Homocline

Section B

Write brief answers (within 200 words) for any three of the following:

Make a list of functional differences between vertebrates and invertebrates.

Write the standard stratigraphic time-scale beginning from the oldest (Give most recent classification).

What are the benthic and plapktonic organisms?

What is the origin of the following geological names:

Siwalik

Gondwana

Gondite

Khondalite

Jurassic

How are the fossils formed? Describe the mechanism by which organic content of the once living matter gets preserved in rock records.

Discuss the reasons for absence of marine Pa1aeozoic rocks in Peninsular India, except for a narrow strip in central India.

Write short answers to the following:

How are unfossiliferous rocks of two or more sections correlated?

What are the major differences between Lower and Upper Gondwana flora?

Which are the most controversial stratigraphic boundaries?

What are the characteristic morphological differences between the gastropods and brachiopods?