Question Q.14Discuss the major features of the ocean floor and their significanceGS1GS1

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

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Answer Strengths Gaps Keywords

Introduction

Ocean floor are vast plains, submerged mountains covering ~71.1% of earth's surface

12 words

Main Body

Major Features & Significance:

(A) Mid Oceanic Ridge

1Chain of mountains under ocean

(Continental shelf, Continental slope, Sea mound, Abyssal plains, Submarine Canyon, Trench, Mid-oceanic ridge)

2Symmetric mid-ridge

3Spread & magnetic Field on ridges at ridge gives sea floor spreading

[Fig 2: Sea floor Spread] New magma in Trench. Which is much younger ~200 Mn vs 3200 Mn for land crust.

(B) Trenches

1Deep trenches varying from 3-5 km

2Provides information about earth's interior magma, mantle composition etc.

3Source of hydrothermal minerals & geothermal energy

4Source of underwater volcanoes

1Flat plain lands of the ocean

2Source of rich organic material - understand marine organisms

(D) Continental Shelf:

1Shelves of continents i.e. continents end with slope

2Provides information about plate movements, marine deposits from rivers, etc.

1Flat plain lands of the ocean

2Source of rich organic material - understand marine organisms

(D) Continental Shelf:

1Shelves of continents i.e. continents end with slope

2Provides information about plate movements, marine deposits from rivers, etc.

182 words5 paragraphs

Conclusion

India has rightly undertaken bathymetric study & Deep Sea Mission to understand ocean characteristics & predict disasters in advance.

19 words

Diagram

Fig 1: Oceanic Floor features - showing continental shelf, continental slope, seamound, abyssal plains, submarine canyon, trench, and mid-oceanic ridge

Diagram included showing major ocean floor features
Identifies key structural components of ocean floor

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Page 34

Topper

Aniket Danjanshwoor Hinde

AIR 812023

Subject & Paper

GS1GS1

Topic

World Physical Geography

Phenomena

Ocean Floor Features

Writing Stats

213

Total words

Paragraphs