India is a vast country with great physical diversity. Its land surface is not uniform. Mountains, plateaus, plains, and coastal areas exist side by side.
To understand India’s geography properly, the country is divided into major physical divisions based on:
- Relief
- Geological structure
- Landform characteristics
These divisions explain India’s climate, rivers, soils, vegetation, agriculture, and human settlement.
Table of Contents
The Himalayan Mountains
Himalayas form the northern boundary of India. They are one of the youngest and highest fold mountain ranges in the world.
Formation and Nature of the Himalayas
The Himalayas were formed due to:
- Collision of the Indian Plate with the Eurasian Plate
This collision caused:
- Folding of sedimentary rocks
- Uplift of huge mountain ranges
The Himalayas are still rising, which makes the region earthquake-prone.
Major Divisions of the Himalayas
The Himalayas are divided into three parallel ranges:
Himadri (Greater Himalayas)
- Highest range
- Contains highest peaks
- Permanently snow-covered
Himachal (Lesser Himalayas)
- Lower than Himadri
- Many hill stations located here
Shiwaliks (Outer Himalayas)
- Lowest range
- Made of loose sediments
Importance of the Himalayas
The Himalayas:
- Act as a climatic barrier
- Stop cold winds from Central Asia
- Give rise to major rivers
- Protect India from invasions
They play a crucial role in India’s physical and cultural life.
Indo-Gangetic Plain
The Indo-Gangetic Plain lies south of the Himalayas.
It is one of the most fertile and densely populated regions of the world.
Formation of Indo-Gangetic Plain
This plain was formed by:
Deposition of alluvium brought by rivers like
- Indus
- Ganga
- Yamuna
- Brahmaputra
Over thousands of years, river sediments created vast flat plains.
Characteristics of Indo-Gangetic Plain
- Flat and level land
- Extremely fertile soil
- Well-developed river system
- Ideal for agriculture and settlements
This plain supports a large part of India’s population.
Importance of Indo–Gangetic Plain
The plain:
- Is India’s main agricultural belt
- Produces food grains like wheat and rice
- Supports major cities
It is often called the food bowl of India.
The Deccan Plateau
The Deccan Plateau lies south of the Indo–Gangetic Plain.
It is the oldest and most stable landmass of India.
Structure of the Deccan Plateau
- Triangular in shape
- Made of hard igneous and metamorphic rocks
- Rich in minerals
The plateau slopes gently from west to east.
Rivers of the Deccan Plateau
Major rivers include:
- Godavari
- Krishna
- Kaveri
These rivers flow eastward into the Bay of Bengal.
Importance of the Deccan Plateau
The Deccan Plateau:
- Is rich in minerals
- Supports industries
- Has black soil suitable for cotton
It plays a major role in India’s economy.
Western Ghats and Eastern Ghats
The Deccan Plateau is bordered by Western Ghats in the west and Eastern Ghats in the east.
Western Ghats
- Continuous mountain range
- Runs parallel to the western coast
- Steep slopes towards the sea
Western Ghats:
- Receive heavy rainfall
- Are source of many rivers
- Rich in biodiversity
Eastern Ghats
- Discontinuous and irregular range
- Lower than Western Ghats
- Cut by rivers flowing eastward
Eastern Ghats receive less rainfall.
Comparison of Western and Eastern Ghats
- Western Ghats are higher and continuous
- Eastern Ghats are lower and broken
- Western Ghats influence monsoon rainfall strongly
Coastal Plains
India has long coastal plains along its western and eastern sides.
Western Coastal Plains
- Narrow and uneven
- Lies between Western Ghats and Arabian Sea
- Includes Konkan and Malabar coasts
Important ports are located here.
Eastern Coastal Plains
- Wider and flatter
- Lies between Eastern Ghats and Bay of Bengal
- Includes Coromandel coast
Many river deltas are found here.
Importance of Coastal Plains
Coastal plains:
- Support fishing activities
- Have fertile delta regions
- Promote trade and ports
They strengthen India’s maritime connections.
Why Physical Divisions of India Matter
These divisions:
- Control climate and rainfall
- Decide river systems
- Influence agriculture and vegetation
- Affect population distribution
Understanding them helps in answering map-based and conceptual questions.
Physical Division of India – FAQs
Which is the youngest mountain range of India?
The Himalayas.
Which physical division is most fertile?
Indo–Gangetic Plain.
Which plateau is the oldest landmass?
Deccan Plateau.
Which Ghats receive more rainfall?
Western Ghats.
Why are Eastern Ghats discontinuous?
Because rivers cut through them.
Which rivers form the Indo-Gangetic Plain?
Indus, Ganga, and Brahmaputra.
Which soil is found in Deccan Plateau?
Black soil.
Which coastal plain is wider?
Eastern Coastal Plain.
Why are deltas common on eastern coast?
Due to slow-flowing rivers.
Which division protects India from cold winds?
The Himalayas.
Last-Moment Notes (Cheat Sheet)
- India has diverse physical divisions
- Himalayas → young fold mountains
- Himalayas block cold winds
- Indo–Gangetic Plain → fertile, flat
- Formed by river alluvium
- Deccan Plateau → oldest landmass
- Rich in minerals
- Western Ghats → high, continuous
- Eastern Ghats → low, broken
- Western coastal plain → narrow
- Eastern coastal plain → wide
- Physical divisions control climate and rivers