Ancient asteroid strike in Australia "changed face of earth"

A strike from a big asteroid more than 300 million years ago left a huge impact zone buried in Australia and changed the face of the earth, researchers said on Friday.

 "The dust and greenhouse gases released from the crater, the seismic shock and the initial fireball would have incinerated large parts of the earth," said Andrew Glikson, a visiting fellow at the Australian National University.

 The asteroid was bigger than 10 km (6 miles) in diameter, while the impact zone itself was larger than 200 km (120 miles) - the third largest impact zone in the world.

 "The greenhouse gases would stay in the atmosphere for tens of thousands of years," Glikson told Reuters.

 The discovery was made after another researcher alerted Glikson to some unusual mineral deposits in the East Warburton Basin in South Australia. 

 Glikson and colleagues analysed quartz grains drawn from deep beneath the earth's surface in research starting in 2010 and the crater itself was recently identified, he added.

 The strike may have been part of an asteroid impact cluster which caused an era of mass extinction, wiping out primitive coral reefs and other species, added Glikson, co-author of a study published in the journal Tectonophysics.

 The impact happened before the dinosaurs, he said.

 The announcement of the discovery came just before a newly discovered asteroid about half the size of a football field was set to pass some 27,520 km (17,200 miles) from Earth. 

 

 

Print
  • Twitter
  • submit to reddit
comments powered by Disqus

Cricket: Indian Premier League

Find the best properties for sale & rent in the UAE
Available on the App StoreAndroid app on Google Play

Most Popular on Emirates 24|7

Poll

How many IPL matches have you got tickets for?

Latest jobs available

More jobs on Emirates 24|7

In Case You Missed It ...

eSuggestion eComplain eComplain eSuggestion

Your Feedback

Are you satisfied with your browsing experience?

Follow
Emirates 24|7

Follow
Emirates 24|7
Pinterest Facebook Facebook Twitter RSS