Physical Features of India

Why This Chapter Matters

India's surface looks like a collection of very different worlds: snow-covered mountains in the north, flat alluvial plains, a rocky plateau, desert dunes, humid coasts and tropical islands.

These forms did not appear independently. They are the result of geological history. The ancient Peninsular block belonged to an old continental mass. The Indian plate later moved northward and collided with Eurasia, uplifting the Himalayas. Sediments eroded from mountains and plateaus accumulated in the foreland basin to form the Northern Plains.

So the chapter is a geological story written into the landscape. If you understand how a landform formed, its soils, rivers, resources and settlement patterns become much easier to remember.

Bridge from Earlier Learning

• Plate tectonics at a basic level
• Mountains plains and plateaus
• Weathering and erosion
• River deposition
• Political and physical maps of India

These are the tools this chapter will connect into a larger geographical explanation.

1. Why India's Relief Is So Diverse

2. Plate Movement and the Himalayan Story

The Indian plate moved northward after separating from the ancient Gondwana landmass.

Between the Indian and Eurasian plates lay the Tethys Sea. Sediments accumulated in that marine zone. Collision compressed and folded these sediments, helping create the Himalayan mountain system.

The process did not end in the distant past. The region remains tectonically active, which is one reason Himalayan areas experience earthquakes and ongoing uplift.

3. The Himalayas — Three Parallel Ranges

The Himalayas form an arc along India's northern margin.

The Himadri or Greater Himalaya is the northernmost and highest range, containing many great peaks and glaciers. The Himachal or Lesser Himalaya lies south of it and includes important valleys and hill stations. The Shiwaliks are the outermost and lowest range, made largely of unconsolidated sediments.

Longitudinal valleys between the Lesser Himalaya and Shiwaliks are often called duns, such as Dehra Dun.

4. Regional Divisions of the Himalayas and the Eastern Hills

The Himalayas can also be divided from west to east using river valleys and regional names.

Beyond the Brahmaputra gorge, the mountain system bends sharply southward. The eastern hills and mountains—often grouped as Purvachal—include ranges such as the Patkai, Naga, Manipur and Mizo hills.

These eastern ranges are generally lower than the main Himalayas but are heavily forested and receive high rainfall.

5. Formation of the Northern Plains

South of the Himalayas lies a vast lowland built from river-borne alluvium.

The Indus, Ganga and Brahmaputra river systems and their tributaries carried enormous loads of sediment from mountains and plateaus. Over long periods these sediments filled a foreland basin and created one of the world's great alluvial plains.

Its flat terrain, fertile soils and abundant water helped support dense settlement and intensive agriculture.

6. Bhabar, Terai, Bhangar and Khadar

The plains are not completely uniform.

Near the Himalayan foothills, coarse pebbles and gravels form the Bhabar belt, where streams can disappear into porous material. South of it lies the wetter Terai, where streams re-emerge and marshy conditions historically developed.

Bhangar refers broadly to older alluvium on slightly elevated terraces, while Khadar is newer alluvium renewed more frequently by floods. Khadar is generally very fertile.

7. The Peninsular Plateau

The Peninsular Plateau is an old tableland built largely from crystalline igneous and metamorphic rocks.

It has broad, shallow valleys, rounded hills and extensive mineral resources. The plateau can be divided into the Central Highlands north of the Narmada and the Deccan Plateau south of the Narmada.

Unlike the young Himalayas, this region is comparatively stable, though faults and volcanic history have shaped parts of it.

8. Central Highlands, Deccan Plateau and Ghats

The Central Highlands include areas such as the Malwa Plateau and extensions toward Bundelkhand, Baghelkhand and the Chotanagpur Plateau.

The Deccan Plateau is broadly triangular. The Western Ghats form a more continuous and generally higher western edge, while the Eastern Ghats are lower and discontinuous because major rivers cut through them.

The Deccan Trap region contains extensive basalt produced by ancient volcanic eruptions, which later contributed to black-soil development in many areas.

9. The Indian Desert

The Indian Desert lies mainly west of the Aravalli Hills.

Rainfall is very low and irregular, vegetation is sparse and many streams are ephemeral. Wind action shapes dunes and sandy surfaces. The Luni is an important river of the region.

Desert geography is not empty geography: settlements, irrigation, pastoralism and agriculture adapt to water scarcity and extreme temperature conditions.

10. Western and Eastern Coastal Plains

India's coastline is bordered by narrow to broad plains.

The Western Coastal Plain between the Western Ghats and Arabian Sea is generally narrow. It includes Konkan in the north, the Karnataka/Kannad coastal stretch and Malabar farther south.

The Eastern Coastal Plain is broader in many places because major east-flowing rivers build large deltas. It includes the Northern Circars and Coromandel Coast.

Coastal plains support ports, fisheries, agriculture, tourism and dense settlement, but are also exposed to cyclones, erosion and sea-level hazards.

11. The Islands

India has two major island groups.

The Lakshadweep Islands in the Arabian Sea are mainly coral islands and atolls. The Andaman and Nicobar Islands in the Bay of Bengal are larger, more numerous and associated with submarine mountain systems and tectonically active zones.

Barren Island in the Andaman Sea region is India's active volcano. The islands have major strategic, ecological and maritime significance.

12. Landforms and Human Geography

Physical features are not merely scenery.

The Himalayas store snow and ice and feed rivers. The Northern Plains support intensive agriculture and dense settlement. The Plateau contains important minerals and energy resources. Coasts support ports and fisheries. Islands extend India's maritime reach and preserve unique ecosystems.

Geography therefore connects landform origin with present-day opportunity, risk and human use.

Compare the Patterns

Map Work — What You Should Be Able to Locate

• Himadri
• Himachal
• Shiwaliks
• Northern Plains
• Thar Desert
• Central Highlands
• Deccan Plateau
• Western Ghats
• Eastern Ghats
• Western Coastal Plain
• Eastern Coastal Plain
• Lakshadweep
• Andaman and Nicobar Islands

Visualise the Spatial Pattern

India's relief is a geological story: ancient plateau, young fold mountains, river-built plains, desert, coasts and islands.

Exam Thinking Strategy

Common Mistakes

Quick Revision

Focused Practice

Final Chapter Summary