District – Alwar, Jaipur, Ajmer, Rajsmand, Udaipur, Sirohi and south west part of Tonk.
Length – 692 Km (from Palanpur in Gujrat to Delhi)
Average Height – 600 m
Highest Peak – Gurushikhar (1722 m)
In Rajasthan Aravalli Range starts from Sirohi & end at Khetri in Jhunjhunu.
Aravalli range is not continues
Structurally- It is composed of rocks which are originally related to the Delhi System.
In south the range opens out to form several ridge.
Aravalli range & hilly tract can be divided into following four parts.
- North Eastern Hills:
- Central Aravalli Range:
- The Mewar Rocky Region:
- The Abu Block:
Contents
- 1 🏔️ Aravalli Range & Hilly Region – Overview
- 2 📍 What is the Aravalli Range?
- 3 🌍 Geographic Extent
- 4 🧾 Geological Significance
- 5 🌱 Ecological Importance
- 6 🏞️ Important Hills & Regions in the Aravalli Range
- 7 ⚠️ Environmental Concerns
- 8 🧠 Why Aravallis Matter Today
- 9 📝 Key Facts for Exams (UPSC, State PCS, etc.)
- 10 Lithology and Structure of Aravalli Supergroup and …
- 11 Plants of the Northern Aravalli Range in Delhi
- 12 Aravalli Range & Hilly Region
- 13 THE VANISHING ARAVALLIS
North Eastern Hills:
Districts – Jaipur, Sikar, Khetri, Alwar, Sawai Madhopur
Average Height – 300 m to 670 m
Valleys between the hills are wide & in some cases stretch for many kilometer
Flattered hill tops – form small plateau.
To the east & north – it merge with Ganga – Yamuna plain
Lake – Sambhar, Ramgarh, Pandupole
Highest Peak – Raghunathgarh 1055 m in Sikar
Central Aravalli Range:
Districts – Ajmer, Jaipur South Part of Tonk
Length – 100 Km
width – 30 Km
Height/Elevation – 700 m
Depth of valley – 550 m
Highest Peak/elevation – 799 m in Rajgarh
The central/Aravalli extends from Sambhar Lake to the bhorat Plateau, South of Deogarh Peak.
The characteristics of this region are-
A sharp & well defined boundary in west
Eastward followed by a system of two to three parallel ridges rising to an altitude of 600 m.
The edge of Mewar Plateau represented in large sections by a prominent scarp that is often coincident with the shear zone.
The south east directed transverse drainage.
Central Aravalli Range is further sub-divided into 2 geomorphic units.
- Sambhar Basin:
District – Churu, Sikar, Jhunjhunu, Nagaure
Average of Region – 400 m
This region is full of sand hills & with in land drainage. - Marwar Hills:
District – Jodhpur, Barmer, Jaisalmer, Nagaur, Ajmer
Area – 4400 Sq. Km
Average level – 550 m
S.F. – The Taragarh (873 m) overlooks the city of Ajmer.
Marwar Hills appear in the parallel succession of hills in the vicinity of Ajmer city.
The Mewar Rocky Region:
Districts – Udaipur, Rajsamand, Dungarpur, Sirohi, Bhilwara and Chittorgarh
Area – 17007 Sq. Km
Location – It is located from South East to South East
Average Height – 1225 m
S.F. – The highest portion of Aravalli range lies between the forts of Kumbhalgarh & Gogunda in the form of plateau locally known as ‘Bhorat’
Altitude of Bhorat – 1225 m
Bhorat plateau is one of the highest table lands of Aravalli.
The Abu Block:
District – Abu, Sirohi
Area – 5180 Sq. Km
Length – 10 km
Breadth – 8 Km
Location – West to Abu in Sirohi
Sea Level – 1200 m
S.F.– It contains granite
It has been separated from the main Aravalli range by the wide valley of the West Banas.
🏔️ Aravalli Range & Hilly Region – Overview
📍 What is the Aravalli Range?
The Aravalli Range is one of the oldest fold mountain ranges in the world, dating back to the Precambrian era — over 2.5 billion years old. It runs southwest to northeast across northwestern India.
🌍 Geographic Extent
| Feature | Details |
|---|---|
| 🗺️ Location | Spans across Rajasthan, Haryana, Delhi, and Gujarat |
| 🧭 Orientation | Southwest to northeast |
| 🏞️ Length | Approximately 800 km |
| ⛰️ Highest Peak | Guru Shikhar (1,722 m) in Mount Abu, Rajasthan |
🧾 Geological Significance
- One of the oldest mountain systems on Earth
- Formed during the Archean Eon due to tectonic activity
- Now relict mountains — meaning eroded and not tectonically active
- Rich in minerals like zinc, lead, copper, and marble
🌱 Ecological Importance
| Feature | Role |
|---|---|
| 🌳 Forest Cover | Supports dry deciduous and thorn forests |
| 🐆 Biodiversity | Habitat for leopards, hyenas, antelopes, and native flora |
| 🌬️ Climate Barrier | Protects eastern Rajasthan from desertification |
| 💧 Watershed | Source of many rivers (e.g., Banas, Sahibi) and groundwater recharge zones |
🏞️ Important Hills & Regions in the Aravalli Range
| Area | State | Notable Feature |
|---|---|---|
| ⛰️ Mount Abu | Rajasthan | Hill station & highest peak (Guru Shikhar) |
| 🐆 Sariska Hills | Rajasthan | Sariska Tiger Reserve |
| 🌲 Delhi Ridge | Delhi | Northernmost tip; protects Delhi’s green cover |
| 🌄 Abu Road Hills | Rajasthan | Scenic rail route & granite deposits |
| 🏹 Alwar Hills | Rajasthan | Ancient forts, biodiversity, eco-tourism |
⚠️ Environmental Concerns
- Illegal mining and deforestation
- Urban sprawl (especially in Delhi–NCR and southern Haryana)
- Disruption of wildlife corridors
- Threat to water security (groundwater recharge affected)
🧠 Why Aravallis Matter Today
| Value | Reason |
|---|---|
| 💧 Water Security | Crucial for recharging aquifers in arid regions |
| 🌳 Green Barrier | Protects Delhi-NCR and Rajasthan from desertification |
| 🐆 Wildlife Habitat | Critical for species survival and biodiversity |
| 🏞️ Eco-Tourism | Supports local economies via trekking, heritage sites, and nature parks |
📝 Key Facts for Exams (UPSC, State PCS, etc.)
- 📌 Oldest fold mountain range in India
- 📌 Runs parallel to the Thar Desert
- 📌 Not continuous — broken and fragmented due to erosion
- 📌 Declared eco-sensitive zone in many parts by MoEFCC
- 📌 Northernmost point: Delhi Ridge
- 📌 Southernmost point: Near Palanpur, Gujarat
Would you like:
- A map of the Aravalli range?
- A comparison between Aravalli & Himalayas?
- A PDF summary for competitive exams?
Let me know and I’ll generate it for you!