Geological originLonar Lake lies within the only known extraterrestrial impact crater found within the great Deccan Traps basaltic formation of India. The lake was initially believed to be of volcanic origin, but now it is recognized as an impact crater created by the hypervelocity impact of either a comet or a meteorite. The presence of plagioclase that has been either converted into maskelynite or contains planar deformation features (PDFs) has confirmed the impact origin of this crater. It is argued that only shock metamorphism caused by hypervelocity impact can transform plagioclase into maskelynite or create PDFs. The presence of shatter cones, impact deformation of basalt layers comprising its rim, shocked breccia inside the crater, and non-volcanic ejecta blanket surrounding the crater are further proof of the impact origin of Lonar crater. As a result of the studies, broadly, the geological features of the Lonar crater has been marked under five distinguishable zones, exhibiting distinct geomorphic characteristics.
The five zones are:
- The outermost ejecta blanket
- The crater rim
- The slopes of the crater
- The crater basin, excluding lake
- The crater lake
HistoricityThe lake was first mentioned in ancient scriptures such as the Skanda Purana, the Padma Puran and the Aaina-i-Akbari  The first European to visit the lake was British officer, J.E. Alexander in 1823.
Buldhana district in Maharashtra, where the lake is located, was once part of Ashoka's empire and then of Satavahana's. The Chalukyas and Rashtrakutas also ruled this area. During the period of the Mughals, Yadavas, Nizam and the British, trade prospered in this area. Several temples found on the periphery of the Lake are known as Yadava temples and also as Hemadpanti temples (named after Hemadri Ramgaya).