The Aravalli Mountain Range is one of the oldest mountain systems in the world and an important geographical feature of Rajasthan. It separates the Thar Desert from the fertile plains and supports rivers, forests, and biodiversity. Understanding the Aravalli Range is essential for Rajasthan GK, geography studies, and RPSC RAS Exam 2026 preparation.
 

The Aravalli Range is one of the oldest mountain ranges in the world and an extremely important geographical feature of north-western India. The Aravalli Mountain Range plays a vital role in shaping the physical geography, climate, rivers, biodiversity, and environment of Rajasthan. Because of its geological age and ecological significance, it is an essential topic for Rajasthan Geography, Rajasthan GK, and RPSC RAS Exam 2026 preparation.

The Aravalli hills are located about 700-800km on the Delhi Ridge on the north to Haryana and Rajasthan, up to Gujarat on the southwest. This is a chain of mountains that serves as a natural wall that divides the Thar Desert and the fertile plains of northern India. The highest peak of the Aravalli Range is Guru Shikhar, located near Mount Abu.

Overview of the Aravalli Mountain Range

The Aravalli Mountain Range forms a long chain of ancient hills running in a northeast to southwest direction across north-western India. It is considered one of the oldest mountain systems on Earth, formed nearly 1.5–2 billion years ago during the Precambrian period.

The Aravalli Range separates the state of Rajasthan into two geographical regions that are not only arid and dry, such as the Thar Desert region in the western part of the area, but also geographically fertile plains and plateau terrain in the eastern part of the state. Due to this geographical cleavage, the Aravalli mountains have an overwhelming effect in the rain, climatic conditions, farming, and residential areas in Rajasthan.   

Location and Extent of the Aravalli Range

The Aravalli Mountain Range of India starts at the Delhi Ridge and extends up to the states of Haryana, Rajasthan and Gujarat. Much of the Aravalli hills is situated in Rajasthan, hence it is the most significant mountain system in the state.

The Aravalli range crosses many districts such as Alwar, Jaipur, Ajmer, Rajsamand, Udaipur, Sirohi and Mount Abu in the state of Rajasthan. These hills form a natural barrier between the desert land in the western part of Rajasthan and the more productive agricultural land in the eastern part.

Major Sections of the Aravalli Range 

• Delhi Ridge (northern extension of Aravalli)
• Alwar Hills
• Jaipur–Ajmer Hills
• Mewar Hills (Udaipur region)
• Mount Abu Hills (southern Aravalli)

Geological Formation of the Aravalli Mountains

The Aravalli Mountain Range is among the oldest geological features found on the earth. These mountains are tectonic and were formed during the Precambrian period and are therefore older than most of the other mountain systems, like the Himalayas.

Over millions of years, intense erosion reduced the height of these mountains, leaving behind a series of low rocky ridges, hills, and valleys. Despite erosion, the Aravalli hills remain an important geological structure with rich mineral deposits.

Major Rock Types Found in Aravalli 

• Granite
• Quartzite
• Marble
• Gneiss
• Schist

The Aravalli region is rich in mineral resources such as copper, zinc, lead, marble, and limestone, which are important for mining and industry in Rajasthan.

Highest Peak of the Aravalli Range

The highest peak in the Aravalli Mountain Range is Guru Shikhar, located in the Mount Abu region of Rajasthan. It rises to an elevation of 1,722 meters (5,650 feet) above sea level.

Guru Shikhar is the highest point of the Aravalli Range, besides being a significant tourist destination. It has a summit that has a panoramic view of the hills around it, and also houses the Mount Abu Observatory, which is an astronomical research center.

Important Peaks in the Aravalli Range 

Rivers Originating from the Aravalli Range

The Aravalli hills are a great water divider in Rajasthan since many rivers pass through those mountains. These rivers empty either to the eastern plains or to the desert areas in the west.

Major Rivers Originating from the Aravalli Range 

These rivers are important for agriculture, irrigation, and water supply in Rajasthan.

Climate and Environmental Importance of the Aravalli Range

The Aravalli Mountain Range significantly affects the climate of the state of Rajasthan. The hills serve as a natural obstacle to slow down the eastward movement of the Thar Desert. The mountains also assist in sustaining the water level in the ground since rain water is able to seep into the fractured rocks and thus recharging the underground aquifers..

Environmental Importance 

• Prevents expansion of the Thar Desert
• Helps recharge groundwater resources
• Supports forest ecosystems and biodiversity
• Moderates regional climate

Biodiversity of the Aravalli Range

The Aravalli hills support a variety of forests, grasslands, and rocky habitats that provide shelter to numerous wildlife species. Several national parks and wildlife sanctuaries are located in this region.

Important protected areas located in the Aravalli range include:

• Sariska National Park
• Kumbhalgarh Wildlife Sanctuary
• Mount Abu Wildlife Sanctuary

Wildlife found in the Aravalli region includes leopards, hyenas, sloth bears, jackals, and many bird species.

Environmental Threats to the Aravalli Range

Despite its importance, the Aravalli Mountain Range faces serious environmental threats due to human activities.

Major problems affecting the Aravalli ecosystem include illegal mining, deforestation, urban expansion, and groundwater depletion. These activities have damaged large parts of the hills and reduced forest cover.

Major Environmental Challenges 

• Illegal mining activities
• Deforestation and land degradation
• Rapid urbanization
• Declining groundwater levels

To protect the Aravalli ecosystem, the Supreme Court of India has imposed restrictions on mining in several parts of the range.

Importance of the Aravalli Range in Rajasthan Geography

The Aravalli Mountain Range is one of the most important geographical features of Rajasthan. It influences the climate, river systems, agriculture, biodiversity, and settlement patterns of the state.

Major Importance of Aravalli Range 

• Natural barrier against the Thar Desert
• Source of important rivers in Rajasthan
• Supports biodiversity and wildlife habitats
• Rich in mineral resources
• Important for groundwater recharge

Because of its geographical and ecological significance, the Aravalli Range is a crucial topic for RPSC RAS Exam 2026, Rajasthan GK, and Indian physical geography studies.

Conclusion

The Aravalli Mountain Range is a system of the oldest geological mountain in the world and an important physical landmark of north-western India. The Aravalli hills which stretch over Delhi, Haryana, Rajasthan and Gujarat are significant in determining the climate, rivers, biodiversity, and natural environment of Rajasthan.

The range acts as a natural barrier against the expansion of the Thar Desert, supports groundwater recharge, and provides habitats for various wildlife species. Because of its geographical, ecological, and environmental significance, the Aravalli Range is an important topic for Rajasthan Geography, Rajasthan GK, and RPSC RAS Exam 2026 preparation.

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