A Billion Years in 40 Seconds: Mesmerizing Video Reveals the Evolution Our Dynamic Planet – SciTechDaily

Geoscientists have released a video that for the first time shows the uninterrupted movement of the Earths tectonic plates over the past billion years.

The international effort provides a scientific framework for understanding planetary habitability and for finding critical metal resources needed for a low-carbon future.

It reveals a planet in constant movement as land masses move around the Earths surface, for instance showing that Antarctica was once at the equator.

The video is based on new research published in the March 2021 edition of Earth-Science Reviews.

Video showing the movement of Earths tectonic plates over the past billion years. Credit: Dr. Andrew Merdith/University of Lyon

Co-author and academic leader of the University of Sydney EarthByte geosciences group, Professor Dietmar Mller, said: Our team has created an entirely new model of Earth evolution over the last billion years.

Professor Dietmar Mller from the EarthByte group in the School of Geosciences at the University of Sydney. Credit: Britta Campion

Our planet is unique in the way that it hosts life. But this is only possible because geological processes, like plate tectonics, provide a planetary life-support system.

Lead author and creator of the video Dr. Andrew Merdith began work on the project while a PhD student with Professor Mller in the School of Geosciences at the University of Sydney. He is now based at the University of Lyon in France.

Co-author, Dr. Michael Tetley, who also completed his PhD at the University of Sydney, told Euronews: For the first time a complete model of tectonics has been built, including all the boundaries

On a human timescale, things move in centimeters per year, but as we can see from the animation, the continents have been everywhere in time. A place like Antarctica that we see as a cold, icy inhospitable place today, actually was once quite a nice holiday destination at the equator.

Co-author Dr. Sabin Zahirovic from the University of Sydney, said: Planet Earth is incredibly dynamic, with the surface composed of plates that constantly jostle each other in a way unique among the known rocky planets. These plates move at the speed fingernails grow, but when a billion years is condensed into 40 seconds a mesmerizing dance is revealed.

Oceans open and close, continents disperse and periodically recombine to form immense supercontinents.

Earth scientists from every continent have collected and published data, often from inaccessible and remote regions, that Dr. Andrew Merdith and his collaborators have assimilated over the past four years to produce this billion-year model.

It will allow scientists to better understand how the interior of the Earth convects, chemically mixes and loses heat via seafloor spreading and volcanism. The model will help scientists understand how climate has changed, how ocean currents altered and how nutrients fluxed from the deep Earth to stimulate biological evolution.

Professor Mller said: Simply put, this complete model will help explain how our home, Planet Earth, became habitable for complex creatures. Life on Earth would not exist without plate tectonics. With this new model, we are closer to understanding how this beautiful blue planet became our cradle.

Reference: Extending full-plate tectonic models into deep time: Linking the Neoproterozoic and the Phanerozoic by Andrew S. Merdith, Simon E. Williams, Alan S. Collins, Michael G. Tetley, Jacob A. Mulder, Morgan L. Blades, Alexander Young, Sheree E. Armistead, John Cannon, Sabin Zahirovic and R. Dietmar Mller, 24 December 2020, Earth-Science Reviews.DOI: 10.1016/j.earscirev.2020.103477

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A Billion Years in 40 Seconds: Mesmerizing Video Reveals the Evolution Our Dynamic Planet - SciTechDaily