Subscribe to our free daily newsletters
. 24/7 Space News .

Subscribe to our free daily newsletters

The World In Motion Much Earlier Than Previously Thought

Not far from one section of the Great Wall in the Eastern Hebei Province researhers have found wht they think is the 2.5 Billion year old rocks that point to an earlier start to tectonics than previously thought
St. Louis - May 14, 2001
A Saint Louis University researcher has made a discovery near the Great Wall in China that could change the science of plate tectonics and provide some clues into how life might have developed on Earth.

The research, a collaborative effort involving Peking University and Washington University in St. Louis researchers, was published as a report in the May 11, 2001 issue of Science magazine.

It has been widely held that plate tectonics, or the motion of plates and continents, dates back 1.9 billion years. Timothy Kusky, Ph.D., professor of geology at St. Louis University, is part of a group of geologists who believe the plates began moving much sooner.

Kusky now believes he has the data to prove the theory. Last summer, he discovered the oldest complete section of oceanic sea floor on the planet, which is more than 500 million years older than previously documented.

When he returned, he sought the assistance of Robert Tucker, Ph.D., associate professor of earth and planetary science at Washington University in St. Louis, to date the rare samples.

According to Tucker, the rocks are 2.5 billion years old and date back to Earth's earliest geologic time period, known as the Archean. The rocks are remarkably similar to much younger volcanic rocks that erupted on the sea floor in the process of sea floor spreading.

For decades, geologists have debated whether plate tectonics operated in the Archean period. Those who have argued against that theory have cited the lack of any Archean ophiolites as their main line of evidence that plate tectonics did not occur on the early Earth. Ophiolites are rock structures formed on the sea floor when continents collide.

"This discovery shows that the plate tectonic forces that create oceanic crust on the Earth today were in operation more than 2.5 billion years ago," Kusky said.

Kusky said the findings could have a more far-reaching effect on theories related to the development of life on the planet. Scientists believe life on Earth during the Archean period consisted mainly of single-celled organisms in the oceans. Just when they evolved into more complex organisms has been contested for years.

"Because hot volcanic vents on the sea floor may have provided the nutrients and temperatures needed for life to flourish and develop, it's possible that life developed and diversified around these vents as plate tectonics began," Kusky said.

Kusky and Dr. Jiang-Hai Li of Peking University in Beijing made the discovery in a mountain belt in the Eastern Hebei Province, which is located only a few miles from the Great Wall.

Related Links
Washington University in St. Louis
St. Louis University
Search SpaceDaily
Subscribe To SpaceDaily Express

GPS Helps Track Scandinavia In Rebound From Iceage
Toronto - March 22, 2001
The same type of technology used by motorists to help them navigate city roadways can now be used to detect and measure the smallest movements in the Earth's crust, an international group of scientists, including a U of T geophysicist, has found.

Thanks for being here;
We need your help. The SpaceDaily news network continues to grow but revenues have never been harder to maintain.

With the rise of Ad Blockers, and Facebook - our traditional revenue sources via quality network advertising continues to decline. And unlike so many other news sites, we don't have a paywall - with those annoying usernames and passwords.

Our news coverage takes time and effort to publish 365 days a year.

If you find our news sites informative and useful then please consider becoming a regular supporter or for now make a one off contribution.

SpaceDaily Contributor
$5 Billed Once

credit card or paypal
SpaceDaily Monthly Supporter
$5 Billed Monthly

paypal only

Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News

The content herein, unless otherwise known to be public domain, are Copyright 1995-2016 - Space Media Network. All websites are published in Australia and are solely subject to Australian law and governed by Fair Use principals for news reporting and research purposes. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA news reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement, agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement All images and articles appearing on Space Media Network have been edited or digitally altered in some way. Any requests to remove copyright material will be acted upon in a timely and appropriate manner. Any attempt to extort money from Space Media Network will be ignored and reported to Australian Law Enforcement Agencies as a potential case of financial fraud involving the use of a telephonic carriage device or postal service.