Lonar Crater Lake has once again drawn scientific attention due to its seasonal colour-changing phenomenon, where the lake appears blue, green, and sometimes pink or reddish. The lake, formed by a meteorite impact thousands of years ago in the basaltic Deccan Trap region, is regarded as one of India’s most mysterious geological and ecological sites. Scientists consider it a natural laboratory because of its high salinity, alkalinity, and extremophile microbial ecosystem.
Lonar Lake was formed when a meteorite struck the basalt rocks of the Deccan Plateau at extremely high velocity, creating a large circular crater. The crater is nearly 1.8 km wide and around 150 metres deep. The impact later filled with water, eventually forming the present lake.One of the most important scientific aspects of the lake is that it is considered the only known hyper-velocity impact crater formed entirely in basaltic rock anywhere on Earth. This makes it globally significant for studies related to planetary geology, meteor impacts, and volcanic terrains.The exact age of the crater remains debated. Different scientific estimates place it between 50,000 years and over 500,000 years old.
The lake does not retain a constant colour throughout the year. Scientists attribute this phenomenon to the chemical composition of the lake water and the activity of microorganisms.The water of the lake is both saline and highly alkaline, with the pH reportedly nearing 11, which creates extreme environmental conditions unsuitable for most organisms. However, certain microbes thrive in this environment.Important microorganisms mentioned include:
These organisms release natural pigments into the water, causing reddish or pinkish shades. During phases of rapid algal growth, the lake may appear green. Seasonal and chemical variations in the lake further intensify these colour transitions.This has made Lonar Lake an important site for studying:
The crater lies within the Deccan Traps, one of the world’s largest volcanic provinces composed mainly of basaltic lava flows. Since the crater formed in basalt rock, scientists use Lonar Lake to compare impact features found on planetary bodies like Mars and the Moon.The site provides insights into:
Its preservation also helps researchers understand the interaction between geology, hydrology, and biology over long geological timescales.
Despite the harsh water conditions, the surrounding region supports rich biodiversity. The crater falls within the Lonar Wildlife Sanctuary, spread across approximately 365 hectares.The area contains dry deciduous forests and supports wildlife such as:
The lake is also an important bird habitat. Around 160 bird species have reportedly been recorded, including:
Thus, Lonar represents a rare combination of geological heritage and ecological diversity.
Lonar Lake also possesses historical and religious significance. Ancient texts such as:
mention the site.Several temples are located around the crater rim and basin. The most famous among them is the Daitya Sudan Temple, associated with Lord Vishnu’s victory over the demon Lonasura. The temple is built in the Hemadpanthi architectural style.Thus, the site combines:
Lonar Lake is important from multiple dimensions:
| Dimension | Relevance |
|---|---|
| Geography | Meteor impact crater, crater lake, Deccan Traps |
| Environment | Extremophiles, saline ecosystems, biodiversity |
| Science & Technology | Astrobiology, microbial studies |
| Culture | Ancient temples, Hemadpanthi architecture |
| Disaster & Earth Science | Meteorite impacts and crater formation |
| Feature | Details |
|---|---|
| Location | Buldhana district, Maharashtra |
| Type | Meteor impact crater lake |
| Diameter | Approx. 1.8 km |
| Depth | Approx. 150 metres |
| Geological Setting | Basaltic Deccan Traps |
| Water Nature | Saline and alkaline |
| pH Level | Around 11 |
| Wildlife Protection Area | Lonar Wildlife Sanctuary |
| Important Temple | Daitya Sudan Temple |
| Famous For | Colour-changing lake and extremophile ecosystem |
Updated – 06 February 2026 ; 10:33 AM | Times of India