Physical Features of India

India's physical landscape is extraordinarily diverse — from the world's highest mountains to vast plains, ancient plateaus, and a long coastline. Understanding these physical divisions is fundamental to understanding India's climate, rivers, soils, and human settlement patterns.

Major Physical Divisions

1. 1.India has six major physical divisions:
2. 2.The Himalayan Mountains
3. 3.The Northern Plains
4. 4.The Peninsular Plateau
5. 5.The Indian Desert
6. 6.The Coastal Plains
7. 7.The Islands

The Himalayan Mountains

Example 1: Formation of the Himalayas
The Himalayas were formed by the collision of the Indian Plate (moving northward) with the Eurasian Plate. The sediments of the ancient Tethys Sea were compressed and uplifted to form the Himalayas. This process began about 50 million years ago and continues today (the Himalayas are still rising). This makes them young fold mountains.

• The Himalayas have three parallel ranges:
• Himadri (Greater Himalayas): Northernmost, highest, with peaks like Everest (8848 m) and Kanchenjunga. Permanently snow-covered.
• Himachal (Lesser Himalayas): Middle range, 3700–4500 m. Contains famous hill stations (Shimla, Mussoorie, Nainital).
• Shivaliks (Outer Himalayas): Southernmost, lowest (900–1100 m). Separated from Himachal by longitudinal valleys called duns (e.g., Dehradun).

Example 2: Purvanchal
In the northeast, the Himalayas turn south to form the Purvanchal (Eastern Hills) — including the Patkai, Naga, Manipur, and Mizo hills. These separate India from Myanmar.

The Northern Plains

Example 3: Formation of the Northern Plains
As the Himalayas rose, a deep depression formed in front of them (a foredeep) which was gradually filled by sediments brought by rivers — the Indus, Ganga, and Brahmaputra. Over millions of years, alluvial deposits up to 2400 m deep created the vast, flat Northern Plains, covering about 7 lakh sq km.

• These plains are India's most fertile agricultural land. Key features:
• Bhabar: Coarse pebbles deposited by rivers at the base of Shivaliks; streams disappear underground here.
• Terai: South of bhabar, a moist, marshy zone where underground streams re-emerge.
• Bhangar: Older alluvium, slightly elevated, contains kankar (calcium carbonate nodules).
• Khadar: Newer alluvium, very fertile, in river floodplains.

The Peninsular Plateau

Example 4: The Deccan Plateau
The Peninsular Plateau is an ancient landmass (part of Gondwanaland), made of igneous and metamorphic rocks. It tilts slightly westward. The Deccan Plateau (south of Narmada) is the main part. The Western Ghats (steep) border it on the west; the Eastern Ghats (discontinuous, lower) border it on the east.

• The plateau contains:
• Chota Nagpur Plateau: Rich in minerals (coal, iron, copper).
• Aravalli Hills: One of the world's oldest mountain ranges.
• Malwa Plateau: In MP and Rajasthan.

The Indian Desert

• Example 5: The Thar Desert
• The Thar (Great Indian Desert) lies in western Rajasthan and extends into Pakistan. It has:
• Sand dunes and rocky terrain.
• Scanty rainfall (less than 150 mm/year).
• Luni River: Only significant river in the region (drains into Rann of Kutch).
• The desert is bounded by the Aravalli Hills on the east.

The Coastal Plains

• Example 6: Eastern and Western Coastal Plains
• Western Coastal Plain: Narrow (50–100 km wide), lies between the Western Ghats and the Arabian Sea. Includes the Konkan (north), Goa coast, and Malabar Coast (south).
• Eastern Coastal Plain: Wider (100–130 km), lies between the Eastern Ghats and Bay of Bengal. Includes the Coromandel Coast (south) and Northern Circars (north). Major deltas (Mahanadi, Krishna, Godavari, Kaveri) are here.

The Islands

• Example 7: Andaman and Nicobar vs. Lakshadweep
• Andaman and Nicobar: In the Bay of Bengal; continental islands (submerged mountains); have tropical rainforests.
• Lakshadweep: In the Arabian Sea; coral islands; smallest Union Territory of India.

Key Concepts

• Young fold mountains: Recently formed, still high, geologically active (Himalayas).
• Block mountains: Formed by faulting (e.g., Vindhyas, Satpura).
• Alluvium: Fine sediment deposited by rivers — forms the basis of Northern Plains' fertility.

Students often confuse bhangar and khadar. Remember: Khadar = K for Keep-fresh (newer, more fertile); Bhangar = B for Back in time (older, contains kankar). Also, Western Ghats are continuous and steep (facing the Arabian Sea); Eastern Ghats are discontinuous and lower.

India's six physical divisions each have distinct origins, landforms, and characteristics. The young Himalayas, formed by plate collision, supply rivers and block cold winds. The Northern Plains, formed by alluvial deposits, are India's breadbasket. The ancient Peninsular Plateau is mineral-rich. The Thar Desert, coastal plains, and island groups complete India's remarkable physical diversity.