(Phys.org) An asteroid measuring up to 20km across hit South Australia up to 360 million years ago, scientists say, and left behind the one of the largest asteroid impact zones on Earth, according to new research published today.
The impact zone in the East Warburton Basin was buried under nearly four kilometres of earth, said Dr Andrew Glikson, a visiting fellow to the Australian National University's Planetary Science Institute and a co-author of the paper. "It's significant because it's so large. It's the third largest impact terrain anywhere on Earth found to date," Dr Glikson said. "It's likely to be part of a particular cluster that was linked with a mass extinction event at that time."