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India Physical Divisions — Himalayas Himadri white snow peaks with cascading blue glacial rivers, Deccan Traps Western Ghats Sahyadris green terraced cliffs, and Lakshadweep coral polyps atoll ring with shimmering lagoon waters HIMALAYAN PEAKS Himadri glaciers & fold crash WESTERN SAHYADRIS Anamudi 2,695m & basalt traps LAKSHADWEEP ATOLL Coral polyps & lagoons GEOMORPHOLOGY: ALLUVIAL PLAIN ZONES, DECCAN BASALT WEATHERS, AND CORAL ATOLLS

Physical Features of India: Geomorphology, Divisions, and Soils — Complete Guide

Geography GK • India Physical 17 min read Updated: July 21, 2026

🏔️ Key Takeaways

8,586m Peak
Kangchenjunga: highest peak in India
700k km²
Total alluvial area of the Northern Plains
2,695m Alt
Anamudi summit: highest point in South India
32 sq km
Total land area of coral Lakshadweep

Table of Contents

  1. Introduction: Indian Subplate Tectonics
  2. The Northern Mountains: Himalayas and Purvanchal
  3. The Northern Plains: Alluvial Heartlands and Soil Belts
  4. The Peninsular Plateau: Deccan Traps and Ghat Gaps
  5. The Great Indian Desert (Thar): Sand Seas and Saline Pools
  6. The Coastal Plains: Estuary Backwaters and River Deltas
  7. The Island Archipelagos: Arakan Yoma Ridges and Coral Atolls
  8. Physical Divisions of India Specifications Matrix
  9. Exam-Oriented Quick Revision Points
  10. Frequently Asked Questions

Introduction: Indian Subplate Tectonics

India is a geographically diverse subcontinental landmass. Its geomorphology was shaped by tectonic plate movements: the Indian plate broke away from Gondwanaland and moved north, colliding with the Eurasian plate. This collision closed the ancient Tethys Ocean and pushed up the Himalayas. India is divided into six main physical divisions based on its geological structure, soils, and landforms.

For competitive exams like the UPSC Civil Services, state PSCs, and SSC CGL, understanding India's physical geography, soil classifications, and mountain ranges is essential. Let's study these divisions.

The Northern Mountains: Himalayas and Purvanchal

The Himalayas run for 2,400 km and are structured into three parallel ranges:

The Northern Plains: Alluvial Heartlands and Soil Belts

India's Northern Plains (700,000 sq km) were formed by river silt deposition:

The Peninsular Plateau: Deccan Traps and Ghat Gaps

India's oldest landmass is composed of ancient crystalline rock:

The Great Indian Desert (Thar): Sand Seas and Saline Pools

Situated west of the Aravallis, the Thar Desert is shaped by aridity:

The Coastal Plains: Estuary Backwaters and River Deltas

The Peninsular Plateau is bordered by two contrasting coastal strips:

The Island Archipelagos: Arakan Yoma Ridges and Coral Atolls

India's islands have distinct geological origins:

Physical Divisions of India Specifications Matrix

Physical DivisionTectonic / Geologic OriginMajor Peak or LandmarkPrimary Soil TypeEconomic or Ecological Role
Himalayan MountainsIndian-Eurasian plate collision foldKanchenjunga, Nanda Devi, Dihang GorgeMountain Forest SoilWater source; monsoon trap; climate barrier
Northern PlainsAlluvial deposition basinMajuli river island; Punjab DoabsAlluvial Soil (Khadar/Bhangar)Agricultural granary; dense population hubs
Peninsular PlateauAncient Gondwanaland shield relicAnamudi (2,695m); Chota Nagpur mineral vaultRegur (Black volcanic) & Red SoilMineral storehouse; cotton farming; hydroelectric power
Thar DesertAravalli rain-shadow aridityLuni River; Sambhar Salt LakeArid Sandy SoilSolar/wind power energy; salt mining; tourism
Coastal PlainsPeninsular margin denudationChilika coastal lagoon; Malabar KayalsCoastal Alluvial & Saline SoilMaritime trade ports; fisheries; spice/coconut plantations
IslandsExposed Arakan Yoma (Andaman) & Coral (Lakshadweep)Barren Island active volcano; KavarattiForest & Coral Sandy SoilMarine biodiversity; strategic defense; tourism

Exam-Oriented Quick Revision Points

Frequently Asked Questions

How were the Himalayan mountains formed?

The Himalayas were formed by the tectonic collision of the Indian plate (which broke away from Gondwanaland) with the Eurasian plate. The sediments of the ancient Tethys Ocean were compressed and folded upward, creating young fold mountains.

What are the four soil/topographical zones of India's Northern Plains?

The four zones are: Bhabar (porous pebble belt where streams disappear), Terai (marshy, wet re-emergence zone), Bhangar (older high alluvial terrace with kankar), and Khadar (new, hyper-fertile seasonal floodplain alluvium).

What is the difference between the Western Ghats and the Eastern Ghats?

The Western Ghats (Sahyadris) form a continuous, high wall (900-1,600m) with Anamudi as the highest peak. The Eastern Ghats are discontinuous, heavily eroded (600m average), and cut through by east-flowing rivers.

What are the Deccan Traps and what type of soil do they yield?

The Deccan Traps are a massive volcanic province on the Peninsular Plateau formed by ancient fissure eruptions. Weathering of this basaltic rock yields Regur (Black Cotton Soil), which is highly moisture-retentive and optimal for cotton farming.

Why is the Thar Desert situated to the west of the Aravalli Range?

The Aravalli Range lies parallel to the direction of the Southwest Monsoon winds, failing to block the clouds. By the time the air masses reach the northwest, they are depleted of moisture, creating a rain-shadow desert.

What are Malabar Coast Kayals in Kerala?

Kayals are brackish lagoons and backwater canals running parallel to the southern Western Coastal Plain in Kerala, used for fishing, transport, and tourism.

What is the geological origin of the Lakshadweep Islands?

Unlike the volcanic Andaman islands, the Lakshadweep Islands are coral atolls. They were built over thousands of years by the calcium carbonate skeletons deposited by microscopic marine organisms called coral polyps.

What is Majuli and where is it located?

Majuli is the largest inhabited freshwater riverine island in the world, formed by the shifting channels of the Brahmaputra River in Assam's northern plain.

What are Laurasia and Gondwanaland?

When the supercontinent Pangea split during the Mesozoic era, it divided into two smaller supercontinents: Laurasia in the Northern Hemisphere (consisting of North America, Europe, and Asia) and Gondwanaland in the Southern Hemisphere (consisting of South America, Africa, India, Australia, and Antarctica).

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