Take the pledge to vote

For a better tommorow#AajSawaroApnaKal
  • I agree to receive emails from News18

  • I promise to vote in this year's elections no matter what the odds are.
  • Please check above checkbox.

    SUBMIT

Thank you for
taking the pledge

Vote responsibly as each vote counts
and makes a diffrence

Disclaimer:

Issued in public interest by HDFC Life. HDFC Life Insurance Company Limited (Formerly HDFC Standard Life Insurance Company Limited) (“HDFC Life”). CIN: L65110MH2000PLC128245, IRDAI Reg. No. 101 . The name/letters "HDFC" in the name/logo of the company belongs to Housing Development Finance Corporation Limited ("HDFC Limited") and is used by HDFC Life under an agreement entered into with HDFC Limited. ARN EU/04/19/13618
LIVE TV DownloadNews18 App
News18 English
Powered by cricketnext logo
News18 » India
1-min read

Global Ice age 600 Million Years Ago Dramatically Changed Face of Earth, Says Study

The research examined how distinctive carbonate sedimentary rocks formed over the course of millions of years after the Snowball Earth.

PTI

Updated:October 16, 2019, 2:03 PM IST
facebookTwitter Pocket whatsapp
Where Did Earth's Water Originate From?
File photo. Image for representation

Melbourne: A global ice age over 600 million years ago dramatically altered the face of the planet, leaving a barren, flooded landscape and clear oceans, according to a study that may have important implications for the evolution of complex life.

The research, published in the journal Terra Nova, examined how distinctive carbonate sedimentary rocks formed over the course of millions of years after the Snowball Earth.

The sedimentary rocks, much like the limestone in tropical oceans today, formed in oceans starved of sand and mud eroded from the land, the researchers said.

The study calls into question previous suggestions that the formation of the characteristic rocks took place over a much shorter period of time, they said.

"It was previously thought that these distinctive carbonate rocks were deposited over less than 10 thousand years, as the sea level rose when the ice that covered the entire globe melted, but we have shown that they were likely deposited over hundreds of thousands to millions of years following the sea-level rise," said lead author Adam Nordsvan, a PhD candidate at Curtin University in Australia.

"There is already some evidence that suggested these rocks took a long time to form, but no one had been able to explain why this might have occurred," Nordsvan said.

"What is intriguing about the period following Snowball Earth is that the planet surface was essentially completely renovated. It appears that the extended glacial period removed all the beaches, deserts, rivers and floodplains, and reset important Earth systems that took millions of years to recover," said Nordsvan.

Milo Barham, also from Curtin's School of Earth and Planetary Sciences, said the findings may have important implications for the evolution of complex life.

"The melting of ice sheets after Snowball Earth caused a dramatic rise in sea level, ultimately flooding the continents, driving a remarkable retreat of shorelines and the development of clearer ocean water," Barham said.

"Researchers have long been aware that the timing of Snowball Earth and the development of more complex life seem to have coincided, but no one has really thought about how the oceans being starved of sediment might have helped ancient organisms thrive in the oceans," he said.

Get the best of News18 delivered to your inbox - subscribe to News18 Daybreak. Follow News18.com on Twitter, Instagram, Facebook, Telegram, TikTok and on YouTube, and stay in the know with what's happening in the world around you – in real time.

Read full article
Next Story
Next Story

facebookTwitter Pocket whatsapp

Live TV

Countdown To Elections Results
To Assembly Elections 2018 Results