Saturday , January 16 2021

The relics of the "lost continents" hidden under Antarctica are revealed by satellite images



The European Space Agency (ESA) has discovered relics of lost continents that have been hidden in Antarctica for millions of years.

The satellite images reveal a schedule of the old ground masses buried at 1.6 km below the ice continent, reports Daily Mail.

Scientists said the catches throw a new light on Antarctica, the "less known continent of the Earth."

They used data from the field of Dead Gravity and Ocean Circulation Explorer (GOCE), which fell in full Earth after the fuel was exhausted in 2013.

Although the satellite has been inactive for five years, scientists are still spreading on the data collected in the Earth's gravitational strain.

A team of scientists used GOCE readings to map the Earth's tectonic plate movements under Antarctica.

His research allowed him to track the tectonic changes hidden in the last 200 million years, offering new knowledge about how he formed in Antarctica.

"These gravitational images are revolutionizing our ability to study the continent less understood in the Earth: Antarctica," said co-author Fausto Ferraccioli, chief scientist of Geology and Geophysics of the British Antarctic Survey.

"In eastern Antarctica, we see an exciting mosaic of geological features that reveal similarities and fundamental differences between the crust under Antarctica and other continents to which it has joined up to 160 million years ago."

Scientists combined readings of GOCE with seismic data to create 3D maps of the Earth's lithosphere.

The lithosphere is composed of crust and molten mantle beneath the earth's surface and includes mountains, oceanic coasts and rocky areas called cratons.

The cratons are the leftovers of the ancient continents embedded in the continents as we know them today.

The study revealed that Western Antarctica (green) has a thinner crust than Antarctica of the East (blue), which has a
The study revealed that West Antarctica (green) has a thinner crust than Antarctica of the East (blue), which has a "family resemblance to Australia and India." Image / ESA

The new readings shed light on the separation of Gondwana, a "supercontinent" that housed what today is Antarctica.

While the land mass was divided about 130 million years ago, the map shows that Antarctica and Australia have remained linked recently 55 million years ago.

The study also revealed that Western Antarctica has a thinner crust than East Antarctica, which has a "family resemblance to Australia and India."

Scientists hope to use their discoveries to examine how Antarctica's geological and continental structure is affecting the fusion of its ice.

GOCE's scientist Roger Haagmans said: "It's exciting to see that the direct use of gravity gradients, which were measured for the first time with GOCE, leads to a new independent aspect within the Earth – even under a thick sheet of ice

"It also provides a context of how possible continents were connected in the past before they were separated due to the movement of the card."


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