Question Q.15Discuss the concept of isostasy and explain its role in shaping Earth's major landforms.GS1GS1

Discuss the concept of isostasy and explain its role in shaping Earth's major landforms.

Open scan (p.33)

Answer Strengths Gaps Keywords

Introduction

Isostasy refers to mechanism by which Earth's landforms are created and eroded with time and with effect of weather.

19 words

Main Body

Isostasy is maintained through the action of geomorphic processes and agents.

Geomorphic Processes

[Diagram showing]: Geomorphic Processes

├─ Diastrophism

│ ├Orogeny

│ ├Epeirogeny

│ └Earthquake

│ └Tectonics

├─ Volcanism

└─ Denudation

├Weathering

├Mass Wasting

└Erosion/Deposition

Isostasy

1Landforms are created & destroyed

2Geomorphic processes act to create landform and demude landforms

3This maintain the normal configuration of earth's surface.

Role of Isostasy in shaping Major landforms

1leads to mountain building (orogensis) and continent building (epeirogensis)

Eg - Himalayas formed 60 million years ago

2Earthquakes redistribute the land material due to shaking

3Tectonic forms lead to arrangement of continents & plates.

4Volcanoes shape the rock system, filament, seamounts.

Ex - Indonesian archipelago volcanoes

5Weathering aids to demude the existing landforms through action of weather & climate.

6Mass wasting balance the force in landforms.

Eg - landslide, avalanche.

7Groffon & Deposition maintains isostasy by transporting the debris & sediments.

Ex - River valleys, drumlins, moraines, panchains etc.

Isostasy is earth's and atmosphere's method of maintaining the configuration of surface in a range.

186 words7 paragraphs

Conclusion

Isostasy is earth's and atmosphere's method of maintaining the configuration of surface in a range.

15 words

Diagram

Hierarchical diagram of Geomorphic Processes showing three main categories (Diastrophism, Volcanism, Denudation) with sub-processes

Clear definition of isostasy
Well-structured diagram of geomorphic processes
Good classification of processes
Comprehensive coverage of major processes

Open original scan

Page 33

Topper

Rishabh Sharma

AIR 116

Subject & Paper

GS1GS1

Topic

Salient features of World's Physical Geography

Important Geophysical Phenomena

Isostasy and landforms

Writing Stats

220

Total words

Paragraphs

formal, technical

Tone