Scientists Find One of World's Largest Asteroid Impact Zones in Australia
It's believed to be the largest of its kind ever found, and it's buried under miles of rock. 

Scientists from the Australian National University say they've located a 248-mile-wide asteroid impact zone in the middle of the continent. 

Recently published in the journal Tectonophysics, the research details how the meteorite broke in two before it struck Earth and how the geophysicist team found two scars from the impact. 

Here's the catch: in the hundreds of millions of years since the twin meteorites struck, the crater disappeared under layers of rock.

In a statement released by the university, lead researcher Dr. Andrew Glikson said the team used magnetic imaging to locate bulges in the Earth's mantle, which they believe were created between 300 million to 600 million years ago. 

"There are two huge deep domes in the crust, formed by the Earth's crust rebounding after the huge impacts, and bringing up rock from the mantle below," Dr. Glikson said. 

Together the impact zones, which are some 18 miles below central Australia's Warburton Basin, are nearly 250-times larger than Arizona's Meteor Crater, regarded as one of the world's best preserved craters. 

Glikson and his team haven't matched an extinction event with the collisions, but he says the massive impacts would have been fatal for many species. 

"The two asteroids must each have been over 10 kilometres across – it would have been curtains for many life species on the planet at the time,” Glikson said.

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