Dhala impact structure
Dhala crater (N25°17'59.7" and E78°8'3.1"), a crater formed by impact of an asteroid, is situated in Shivpuri district, Madhya Pradesh State, India and it is second such crater found in India, after Lonar lake.[1] Currently, the diameter of the structure is estimated at 11 km based on field observations. The basement rocks are predominantly composed of granitoids, and in the centralmost part of the structure voluminous melt breccia containing target rock clasts with shock metamorphic features are directly overlain by a post-impact siltstone- shale-sandstone sequence of the Vindhyan Supergroup. Recent geochronological dates suggest that the age of the impact event lies in the range between 1.6 and 2.5 Ga.
Largest in India
Dhala crater is considered as largest crater in India and area between Mediterranian and South East Asia, as such craters are not found any where in China and Japan.[1] [2]
References
- ^ a b PTI (11 January 2009). "Indian geologist discovers oldest impact structure in India". Live Mint, News. Retrieved 26 July 2015.
- ^ Pati.K., J. (2008). "DHALA - A NEW, COMPLEX, PALEOPROTEROZOIC IMPACT STRUCTURE IN CENTRAL INDIA" (PDF). Large Meteorite Impacts and Planetary Evolution IV (2008). Retrieved 2008.
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25°18′N 78°8′E / 25.300°N 78.133°E
Dhala is the largest impact structure currently known in the region between the Mediterranean and southeast Asia.