विभिन्न प्रकार के मरुस्थलों के निर्माण के लिए उत्तरदायी कारकों पर प्रकाश डालते हुए, उनके पार्दी जाने वाली प्रमुख भू-आकृतियों का संक्षिप्त विवरण दीजिए। (उत्तर 250 शब्दों में दीजिए) / Highlighting the factors behind the formation of different types of deserts, give a brief account of the major landforms found in them. (Answer in 250 words)
Introduction
6 words
Main Body
Desert Formation:
1. Warm winds, Mohave, Sonoran, Saharan Desert (chinookwind for eg.)
2. Continentality: Thar Desert, Kyzlkum Desert
3. Horse latitude Deserts: 30° latitude - air deserts aree, no rainfall
4. Cold ocean currents: Humboldt current, Peruvian current form Patagonian and Namibian and Kalahari Deserts
5. Extreme cold: Arctic, Antarctica and parts of Ladakh that are too cold to sustain vegetation.
major Landforms in desert:
1. Sand dunes/Barchans
↝ formed by unidirectional flow of wind.
2. mushroom rocks → formed by flow of wind below a certain height leading to erosion.
3. stumps → formed due to wind erosion of rocks/boulders
4. sand dunes that form patterns on the surface.
Hence, Landforms are mostly temporary and form due to the winds in deserts: wind erosion and temperature differences of night and day (annual range) causes weathering of rocks to form some landforms.
— BHAVIKA CHOFRA · AIR 25
Diagram
Distribution map of major deserts globally including Arctic Desert, Mohave, Sonoran, Kyzlkum, Iranian, Thar, Saharan, Atacama, Patagonian, Kalahari, Australian Desert, Antarctic Desert. Also includes a sphere diagram showing latitude lines (0°, 30°, 60°) for horse latitude desert formation.
- Comprehensive classification by formation factors
- Good use of examples for each desert type
- Clear diagram showing global desert distribution
- Identifies specific wind types and ocean currents
- Uses latitude data for horse latitude deserts
BHAVIKA CHOFRA
World's Physical Geography
Important Geophysical Phenomena
Desert Formation and Landforms
148
Total words
3
Paragraphs
Scientific and geographical
Tone