KM

Kush MotwaniAIR 11

Question Q.14DiscussGS1GS1

The configuration of the ocean floor provides essential information about the geological processes that have shaped the Earth's surface. Discuss the major features of the ocean floor and their significance in the study of oceanography. (Answer in 250 words) 15 Marks

Open scan (p.30)

Introduction

Recently, it was said that 'we know more about outer space than we know about deep ocean'. The reef ocean is a large source of knowledge on the earth

29 words

Main Body

Major features of ocean floor and their significance:

(A) Mid-oceanic Ridges (MOR):

Evidence of ridges (MOR)
Divergence of convergent crust
Related to sea-floor spreading theory

(B) Bijous tropheum (Bathyal region):

Evidence near (MOR)
Aesthium sphere
T-tectele mountains along MOR

(C) Paleomagnetism:

Gives evidence of different cycles in earth's magnetic field
Three period of change [for 70000 years]

Continuation of ocean floor features:

(IV) Trenches:

Deep regions of earth's crust
Inytsina trench [unclear]

(E) Physical plane - deposits and fossils

(E2) Red ore

(E3) Evidence of first life:

Found to be 2.9 billion years ago

(VI) Seamounts:

Evidence of under-sea volcanoes
Could small formation by plate boundary

(VII) Canyons:

Gully features

(VII) Mid plate features

(VIII) Abyssal Plain:

Deposits → maximum mantle life found deep
Help in understanding evolution

Conclusion: The ocean and its landforms have deep science related to Earth's science; hence study of Earth science has started with 'Deep ocean region' and to understand this, and kinship from potential of 'Blue economy'.

179 words13 paragraphs16 bullet points

Conclusion

The ocean and its landforms have deep science related to Earth's science; hence study of Earth science has started with 'Deep ocean region' and to understand this, and kinship from potential of 'Blue economy'.

34 words

  • Opens with relevant quote about ocean exploration
  • Addresses major oceanographic features (MOR, paleomagnetism)
  • Connects to sea-floor spreading theory

Topper

Kush Motwani

AIR 11

Subject & Paper

GS1GS1

Topic

Salient features of World's Physical Geography

Important Geophysical Phenomena

Writing Stats

242

Total words

13

Paragraphs

16

Bullets

Academic, scientific

Tone