Introduction
18 words
Main Body
Nature of Major Rocks and Mode of Origin:
○ Divergence zone → Acidic rocks (Silica)
○ Divergent zones → Basic Basaltic rocks
○ Contact metamorphic rocks
○ Regional metamorphic rocks
eg ○ Carbon from graphite is weaker than diamond but stronger than coal
Rocks are of a huge variety based on how they originate, where they are deposited and how they emerge back.
Continuation of rock types classification:
○ Contact metamorphic rocks
○ Regional metamorphic rocks
Eg ○ Carbon from graphite is weaker than diamond but stronger than coal
Rocks are of a huge variety based on how they originate, where they are deposited and how they emerge back.
— Aditya Talwar · AIR 270
Diagram
Cross-section diagram of earth's crust showing layers with labels: igneous (gradual deposition after erosion), weathering, lillihed and heat (weathering), metamorphic rocks
- Good classification of rock types
- Diagram included to illustrate crust layers
- Mention of specific examples (graphite, diamond, coal)
- Clear differentiation between volcanic zones
Aditya Talwar
World Physical Geography
Geophysical Phenomena
Rock types and formation
204
Total words
11
Paragraphs
1
Bullets
analytical and descriptive
Tone