Landforms of the Earth
ICSE · Class 9 · Geography
Quick revision notes for Landforms of the Earth — ICSE Class 9 Geography. Key concepts, formulas, and definitions for last-minute revision.
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1. Landforms and Geomorphology
- Geomorphology is the systematic study of Earth’s relief features.
- Landforms are the geological destructive configurations or conformations of Earth’s surface.
- Landforms strongly influence human life and activity.
2. Mountains: Meaning, Formation, and Types
- A mountain is a portion of land surface rising considerably above the surrounding area, either as a single eminence or in a range or chain.
- Mountain systems are produced by orogenesis, the process of mountain building.
- Orogenesis literally means the birth of mountains.
3. Fold Mountains
- Fold mountains are caused by horizontal crustal movements.
- These movements wrinkle the Earth’s crust like a pushed tablecloth.
- Anticlines are the arched or upraised parts of folds.
4. Block Mountains
- Block mountains form when crustal movement causes cracks or faults.
- A block of higher land standing between two lower areas is called a block mountain or horst.
- Horst is a portion of Earth’s crust bounded by faults on at least two sides that has risen relative to adjacent portions.
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