As an Amazon Associate we earn from qualifying purchases.

SCIENCE: Does the Earth Eat Its Oceans Every Billion years?

Pangea - deposit photos

The ancient supercontinent of Rodinia turned inside out as the Earth swallowed its own ocean some 700 million years ago, new research suggests.

Rodinia was a supercontinent that preceded the more famous Pangea, which existed between 320 million and 170 million years ago. In a new study, scientists led by Zheng-Xiang Li of Curtin University in Perth, Australia, argue that supercontinents and their superoceans form and break up in alternating cycles that sometimes preserve the ocean crust and sometimes recycle it back into Earth’s interior.

“We suggest that the Earth’s mantle structure only gets completely reorganised every second supercontinent [or every other cycle] through the regeneration of a new superocean and a new ring of fire,” Li wrote in an email to Live Science. The “Ring of Fire” is a chain of subduction zones around the Pacific, where the crust of the ocean grinds underneath the continents. Volcanoes and earthquakes are frequent around the Ring of Fire, lending it its name.

Full Story: Stephanie Pappas, Live Science

close

Join Our Newsletter List, Get 4 Free Books

To view our privacy and other policies, Click Here
Please consider also subscribing to the newsletters of the authors who are providing these free eBooks to you. We are only able to offer them through the generosity of these QSF authors. You can always unsubscribe at a later date if you don't find anything of interest to you.
Once you submit this form, check your inbox to confirm this addition if you joined our newsletter list.

Leave a Comment