Earth's Primeval Continents (Ancient / Bygone Continental Masses)

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#1
Long-lost continent found submerged deep under Indian Ocean
By Alice Klein

An ancient continent that was once sandwiched between India and Madagascar now lies scattered on the bottom of the Indian Ocean.

The first clues to the continent’s existence came when some parts of the Indian Ocean were found to have stronger gravitational fields than others, indicating thicker crusts. One theory was that chunks of land had sunk and become attached to the ocean crust below.

Mauritius was one place with a powerful gravitational pull. In 2013, Lewis Ashwal at the University of the Witwatersrand in South Africa and his colleagues proposed that the volcanic island was sitting on a piece of old, sunken continent.

Although Mauritius is only 8 million years old, some zircon crystals on the island’s beaches are almost 2 billion years old. Volcanic eruptions may have ejected the zircon from ancient rock below.

Now, Ashwal and his team have found zircon crystals in Mauritius that are up to 3 billion years old. Through detailed analyses they have reconstructed the geological history of the lost continent, which they named Mauritia. ...

https://www.newscientist.com/articl...id=SOC|NSNS|2017-Echobox#link_time=1485906278
 

PeteByrdie

Privateer in the service of Princess Frideswide
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#2
Long-lost continent found submerged deep under Indian Ocean
By Alice Klein

An ancient continent that was once sandwiched between India and Madagascar now lies scattered on the bottom of the Indian Ocean.

The first clues to the continent’s existence came when some parts of the Indian Ocean were found to have stronger gravitational fields than others, indicating thicker crusts. One theory was that chunks of land had sunk and become attached to the ocean crust below.

Mauritius was one place with a powerful gravitational pull. In 2013, Lewis Ashwal at the University of the Witwatersrand in South Africa and his colleagues proposed that the volcanic island was sitting on a piece of old, sunken continent.

Although Mauritius is only 8 million years old, some zircon crystals on the island’s beaches are almost 2 billion years old. Volcanic eruptions may have ejected the zircon from ancient rock below.

Now, Ashwal and his team have found zircon crystals in Mauritius that are up to 3 billion years old. Through detailed analyses they have reconstructed the geological history of the lost continent, which they named Mauritia. ...

https://www.newscientist.com/article/2119963-long-lost-continent-found-submerged-deep-under-indian-ocean/?utm_medium=Social&utm_campaign=Echobox&utm_source=Twitter&utm_term=Autofeed&cmpid=SOC|NSNS|2017-Echobox#link_time=1485906278
So, Lemuria is back on the table?
 

EnolaGaia

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#5
There's a Lost Continent Hiding Beneath Europe

There's a lost continent hidden below southern Europe. And researchers have created the most detailed reconstruction of it yet.

The lost continent "Greater Adria" emerged about 240 million years ago, after it broke off from Gondwana, a southern supercontinent made up of Africa, Antarctica, South America, Australia and other major landmasses, as Science magazine reported.

Greater Adria was large, extending from what is now the Alps all the way to Iran, but not all of it was above the water. That means it was likely a string of islands or archipelagos, said lead author Douwe van Hinsbergen, the chair in global tectonics and paleogeography in the Department of Earth Sciences at Utrecht University in the Netherlands. It would have been a "good scuba diving region." ...

FULL STORY: https://www.livescience.com/ancient-lost-continent-beneath-europe.html
 

EnolaGaia

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#6
This is interesting, I think. The now sunken continent of Zealandia surrounding New Zealand. ...
Here's more about Zealandia ...

Zealandia , also known as the New Zealand continent or Tasmantis, is an almost entirely submerged mass of continental crust that sank after breaking away from Australia 60–85 million years ago, having separated from Antarctica between 85 and 130 million years ago. It has variously been described as a continental fragment, a microcontinent, a submerged continent, and a continent. The name and concept for Zealandia was proposed by Bruce Luyendyk in 1995. Zealandia's status as a continent is not universally accepted, but New Zealand geologist Nick Mortimer has commented that "if it wasn't for the ocean" it would have been recognized as such long ago.
FULL ARTICLE: https://en.wikipedia.org/wiki/Zealandia
 
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