If you had a time machine that allowed you to cruise far into Earth’s incredible history, you’d probably want to avoid a window of time around 3.2 billion years ago. If you decided to make that trip, getting out of your time machine would plunge you directly into watery depths, no matter where on Earth you happened to be. That’s what a new study published in Nature Geoscience suggests, and the picture it paints of Earth is one of a vast ocean planet with no continents or landmasses at all.
Earth’s continents are the result of a natural feature of our planet called plate tectonics. Massive plates of the Earth’s crust sort of “float” along, moving very slowly but eventually colliding, pushing huge amounts of rocky material above sea level. That’s what continents are made of, but this new research suggests that 3.2 billion years ago they hadn’t yet formed.
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Earth was a true ‘waterworld’ world 3 billion years ago, according to fascinating new research originally appeared on BGR.com on Tue, 3 Mar 2020 at 10:12:57 EDT. Please see our terms for use of feeds.
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