Chinese scientists have discovered a meteor crater with a diameter of 1,850 metres and a depth of 150 metres at Yilan in northeast China's Heilongjiang province.Led by the Guangzhou Institute of Geochemistry under the Chinese Academy of Sciences, the findings were published online in the Chinese Science Bulletin on Tuesday, Xinhua reported.Located in the southwestern Lesser Khingan Mountains, the bowl-shaped impact crater is mostly well preserved.
With just one-third of its edges eroded. Most of the pit area is covered by white birch.The findings noted that the Yilan crater was formed on Cretaceous granite bedrock, but the exact date of its formation needs further study. Meanwhile, the lacustrine deposits at the bottom of the crater indicate that there was once a lake at the spot, which disappeared around 10,000 years ago.
The discovery can provide new evidence of low-altitude glaciers in northeast China in ancient times, and serve as a "natural crater lab" for the future study of planetary science and geology, according to Chen Ming, a professor at the institute.There are around 190 confirmed impact craters across the world including one in northeast China's Liaoning province, according to the Earth Impact Database.
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