Globally unique double crater identified in Sweden

11 septiembre 2015

Researchers have found traces of two major meteorite impacts in Sweden, a twin strike that occurred around 460 million years ago. One is enormous, while the other is a tenth of the size of the first. The largest crater has a diameter of 7.5 kilometers.
http://www.sciencedaily.com/releases/2015/09/150911095337.htm

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