Lost Continents Beneath Antarctica Unveiled in Dead Satellite's Data

[Judi Lynn]

By Elizabeth Howell, Space.com Contributor | November 15, 2018 08:05am ET

New analysis of data from the Gravity Field and Steady-State Ocean Circulation Explorer (GOCE) mission has revealed rocky zones called "cratons" in the Earth's lithosphere, a zone between our planet's crust and mantle. GOCE plunged into Earth's atmosphere five years ago this month after the craft ran out of orbital-maneuvering fuel. While scientists were unable to predict exactly where GOCE would fall, no debris dropped into populated areas.

GOCE's newly discovered cratons are the leftovers of ancient continents, and they give information about how Earth's modern-day continents are structured — especially Antarctica, scientists working on the study said in a statement from the European Space Agency (ESA).

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GOCE's global tectonic map, plotted by measuring changes in gravitational pull across the Earth.
Credit: Kiel University/BAS

"In East Antarctica, we see an exciting mosaic of geological features that reveal fundamental similarities and differences between the crust beneath Antarctica and other continents it was joined to until 160 million years ago," study co-author Fausto Ferraccioli, the science leader of geology and geophysics at the British Antarctic Survey (BAS), said in the statement.

GOCE orbited Earth between March 2009 and November 2013, looking for slight variations in the Earth's gravity. The satellite's data not only produced a global gravity map, but also revealed local gravity changes with a resolution as small as 80 kilometers (roughly 50 miles).

More:
https://www.space.com/42432-ancient-antarctic-continents-revealed-satellite-data.html