Question 16GS1GS1

Explain the process of formation of volcanic calderas. How do they contribute to the scenic beauty of the region? (Answer in 250 words)

Open scan (p.41)

Answer Strengths Gaps Keywords

Introduction

Volcanic calderas and huge volcanic vent seen in certain geological formations

11 words

Main Body

Volcanic calderas and huge volcanic vent seen in certain geological formations. (@) Hawaiian Island

Foundation of Calderas

Powers of caldera function:

1They are formed due to continuous volcanic eruption over a single volcanic leading to big vent and large geophysical features

2They can be formed in following ways -

(a) Collapsed - oceanic convergence here the oceanic plate moves to subduction zone forming during (a) Copstami at Ecuador

[Diagram shows cross-section of volcanic caldera formation with labels: vent capacity, magma chamber, Asthenosphere, showing eruption of vent by explosion, building of vent by eruption of magma]

Formation of calderas

Powers of caldera function:

1They are formed due to continuous volcanic eruptions over a single volcanic leading to big vent and large geophysical features

2They can be formed in following ways -

(a) Collapsed - oceanic convergence here the oceanic plate moves to subduction zone forming

made the curtained plate leading to subduction zone forming

During volcano (@) Copstami at Ecuador

[Diagram shows cartesian coordinates with subduction zone formation diagram showing continental plate leading to volcano/caldera, subduction zone, convergence]

(b) Diverging of plate—

seen mostly in ridges & oceanic floor; give o-uin magma to build area flows (@) Arratic Ridge Iceland [Diagram shows oceanic divergence with clear vs oceanic divergence markers]

(d) Some are also seen due to rift valley formation (@) Kilimanjaro East African calderas

Contribution = Scenic beauty

1Volcanic islands in Pacific are beautiful and position (@) Hawaii is a tourist destination

2Due to release of chemicals that act as fertilizers added to odorif soils—the vegetation is rich (@) in Pacific islands like Vanuatu

3Volcanic features—dykes, stocks (Bantheld) etc are attracting tourism (@) office

4The geysers and spring of hot water (@) are unique ecosystem giving better to unique biodiversity

5The water bodies shred in calderas form unique lakes. These such geomorphological features need to be studied closely to minimize impact (4) Taal volcano was disastrous)

Contribution = Scenic beauty

1Volcanic islands in Pacific are beautiful and position (@) Hawaii is a tourist destination

2Due to release of chemicals that act as fertilizers added to odorif soils—the vegetation is rich (@) in Pacific islands like Vanuatu

3Volcanic features—dykes, stocks (Bantheld) etc are attracting tourism (@) office

4The geysers and spring of hot water (@) are unique ecosystem giving better to unique biodiversity

5The water bodies shred in calderas form unique lakes. These such geomorphological features need to be studied closely to minimize impact (4) Taal volcano was disastrous)

These such geomorphological features need to be studied closely to minimize impact (4) Taal volcano was disastrous) and have hazard management too.

465 words23 paragraphs

Diagram

Cross-sectional diagram of volcanic caldera formation showing vent capacity, magma chamber, asthenosphere, eruption process with labels for different layers and geological features

Clear structural explanation
Good use of diagram to illustrate formation
Specific examples provided
Comprehensive coverage of different caldera formation mechanisms
Good connection between geological processes and scenic beauty
Multiple examples from different regions
Links geological features to both tourism and ecological value
Mentions hazard management necessity

Open original scan

Page 41

Topper

Sanskriti Trivedy

AIR 172028

Subject & Paper

GS1GS1

Topic

Important Geophysical Phenomena such as earthquakes, Tsunami, Volcanic activity, cyclone etc.

Volcanic activity and landforms

Formation of volcanic calderas and their scenic significance

Writing Stats

476

Total words

Paragraphs

explanatory and structural

Tone