Tuesday , January 19 2021

Relics of lost continents & # 39; which are hidden under Antarctica, are detected by satellite imagery



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

Satellite images reveal a timeline of ancient landlords buried 1.6km below the ice continent, Daily Mail writes.

Scientists have said snaps are a new light in Antarctica, the "least-understood continent on Earth."

They used data from a long dead field Gravity and Ocean Circulation Explorer (GOCE), which fell on Earth after running fuel in 2013.

While the satellite was out of action for five years, scientists are still spilling data gathering on Earth's gravity retreat.

A team of scientists used GOCE reading to determine the movement of Earth's tectonic plates under Antarctica.

Their research has enabled them to follow hidden tectonic shifts over the last 200 million years, offering fresh insights into the formation of Antarctica.

"These gravitational images revolutionize our ability to study the least-understood continent on Earth: Antarctica," said co-author Fausto Ferraccioli, head of geology and geophysics at British Antarctic Research.

"In East Antarctica, we see an exciting mosaic of geological features that reveal the fundamental similarities and differences between the bark below Antarctica and the other continents to which it has been associated for up to 160 million years."

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

The lithosphere consists of a bark and a molten cloak beneath the Earth's surface, encompassing mountain ranges, oceanic backbones and rocky zones called cratone.

The remains of the ancient continents embedded on the continents are as short as we know it today.

The research has shown that West Antarctica (green) has a bark of East Antarctica (blue), which has
Research has shown that West Antarctica (Green) has a bony heyday of East Antarctica (blue), which has "family similarity to Australia and India." Image / ESA

New readings illuminate the collapse of Gondwane, a long-term "supercontinent" that has placed what is now Antarctica.

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

The study also showed that West Antarctica has a heavier bark than East Antarctica, which has a "family similarity to Australia and India."

Scientists are hoping to use their findings to investigate how Antarctic geology and continental structure affect ice melting.

GOCE scientist Roger Haagmans said: "It is exciting to see that the direct use of gravity gradients, first measured with GOCE, results in a fresh independent look inside the Earth – even under a thick ice head.

"It also provides a context in which the continents were probably linked in the past before they moved away from the movement of the board."


Source link