Even After 1.7 Billion Years, Here's How Australia & North America Are Connected To Each Other - Laughing-Colours.com

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January 31, 2018

Even After 1.7 Billion Years, Here's How Australia & North America Are Connected To Each Other

Researchers from Curtin University in Australia have discovered rocks in northern Queensland that bear a striking resemblance to others found on the North American continent. This suggests that the Australian landmass may have once been a part of North America about 1.7 billion years ago.


Published in a scientific journal by the Geological Society of America, the research paper shows that rocks found in Georgetown have signatures unknown in Australia, and instead are similar to those of rocks uncovered in Canada.
Curtin University Ph.D. student Adam Nordsvan, from the School of Earth and Planetary Sciences, says the findings are huge, helping us unravel mysteries behind the 1.6 billion-year-old supercontinent called Nuna. “Our research shows that about 1.7 billion years ago, Georgetown rocks were deposited into a shallow sea when the region was part of North America. Georgetown then broke away from North America and collided with the Mount Isa region of northern Australia around 100 million years later,” Nordsvan said.
“This was a critical part of global continental reorganisation when almost all continents on Earth assembled to form the supercontinent called Nuna.”
Researchers believe that, when Nuna broke apart an estimated 300 million years later, the Georgetown area stuck itself to Australia, becoming a permanent part of the new continent.

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