Lonar Crater Lake Alkaline Ecology Buldhana Maharashtra

Lonar Lake in Buldhana district of Maharashtra is one of only four hypervelocity meteorite impact craters on Earth in basaltic rock, formed approximately 50,000 years ago when a meteorite struck the Deccan Trap plateau, creating a circular lake of 1.8 kilometer diameter with extraordinarily alkaline water (pH 10-10.5) that hosts unique extremophile microbial communities found nowhere else in India. The lake has two zones: the outer freshwater lake and the inner saline alkaline lake separated by a mud ridge, each with distinct chemistry and biological communities. Lonar is a national geo-heritage site and wildlife sanctuary supporting over 160 bird species including flamingos that use the alkaline zone during migration. The alkaline-saline chemistry has attracted research into extremophile bacteria with applications in industrial enzyme production. Around the lake rim, fourteen temples from the medieval Hemadpanthi architectural tradition, including the Daitya Sudan temple, are built from the meteorite impact basalt. The local Banjara and farming communities around the lake have traditional knowledge of seasonal lake behavior, including color changes that can turn the lake pink or green due to algal blooms, which alarmed national media in 2020 before the natural explanation was confirmed.