Did scientists find a lost continent beneath the Indian Ocean?

 

Analyzing beach sand from Mauritius, scientists discovered minerals between 660 million and 1,970 million years old, suggesting an ancient, lost continent beneath the Indian Ocean.

 

By Charles Q. ChoiLiveScience / February 25, 2013

 

 

The remains of a micro-continent scientist call Mauritia might be preserved under huge amounts of ancient lava beneath the Indian Ocean, a new analysis of island sands in the area suggests.



These findings hint that such micro-continents may have occurred more frequently than previously thought, the scientists who conducted the study, detailed online Feb. 24 in the journal NatureGeoscience, say.

 

Researchers analyzed sands from the isle ofMauritius in the western Indian Ocean. Mauritius is part of a volcanic chain that, strangely, exists far from the edges of its tectonic plate. In contrast, most volcanoes are found at the borders of the tectonic plates that make up the surface of the Earth.

 

Investigators suggest that volcanic chains in the middle of tectonic plates, such as theHawaiian Islands, are caused by giant pillars of hot molten rock known as mantle plumes. These rise up from near the Earth's core, penetrating overlying material like a blowtorch. [What Is Earth Made Of?]

 

Mantle plumes can apparently trigger continental breakups, softening the tectonic plates from below until they fragment — this is how the lost continent of EasternGondwana ended about 170 million years ago, prior research suggests. A plume currently sits near Mauritius and other islands, and the researchers wanted to see if they could find ancient fragments of continents from just such a breakup there.

 

Digging in the sand

The beach sands of Mauritius are the eroded remnants of volcanic rocks created by eruptions 9 million years ago. Collecting them"was actually quite pleasant," said researcher Ebbe Hartz, a geologistat the University of Oslo in Norway. He described walking out from a tropical beach, "maybe with a Coke and an icebox, and you dig down underwater into sand dunes at low tide."

 

Within these sands, investigators discovered about 20 ancient zircon grains (a type of mineral) between 660 million and 1,970 million years old. To learn more about the source of this ancient zircon, the scientists investigated satellite maps of Earth's gravity field. The strength of the field depends on Earth's mass, and since the planet's mass is not spread evenly, its gravity field is stronger in some places on the planet's surface and weaker in others.

The researchers discovered Mauritius is part of a contiguous block of abnormally thick crust that extends in an arc northward to the Seychelles islands. The finding suggests Mauritius and the adjacent region overlie an ancient micro-continent they call Mauritia. The ancient zircons they unearthed are shards of lost Mauritia.

 

The researchers meticulously sought to rule out any chance these ancient grains were contaminants from elsewhere.

 

"Zircons are heavy minerals, and the uranium and lead elements used to date the ages of these zircons are extraordinarily heavy, so these grains do not easily fly around — they did not blow into Mauritius from a sandstorm in Africa," Hartz told OurAmazingPlanet.

"We also chose a beach where there was no construction whatsoever — that these grains did not come from cement somewhere else," Hartz added. "We were also careful that all the equipment we used to collect the minerals was new, that this was the first time it was used, that there was no previous rock sticking to it from elsewhere."

 

Peeling continent pieces

 

After analyzing marine fracture zones and ocean magnetic anomalies, the investigators suggest Mauritia separated from Madagascar, fragmented and dispersed as the Indian Ocean basin grew between 61 million and 83.5 million years ago. Since then, volcanic activity has buried Mauritia under lava, and may have done the same to other continental fragments.

 

"There are all these little slivers of continent that may peel off continents when the hotspot of a mantle plume passes under them," Hartz said. "Why that happens is still mind-boggling. Why, after something gets ripped apart, would it rip apart again?"

Finding past evidence of lost continents normally involves tediously crushing and sorting volcanic rocks, Hartz explained. The researchers essentially let nature do the work of pulverization for them by looking at sand.

 

"We suggest lots of scientists try this technique on their favorite volcanoes," Hartz said.

Follow OurAmazingPlanet for the latest in Earth science and exploration news onTwitter @OAPlanet. We're also onFacebook & Google+.






 

 

 

 

 

 

 

 

"I'm just trying to make a way out of no way, for my people" -Modejeska Monteith Simpkins

 

AFRICAN AMERICA IS AT WAR

THERE IS A RACE WAR ON AFRICAN AMERICA

THERE IS A RACE WAR ON AFRICAN AMERICANS

THERE IS A RACE WAR ON BLACK PEOPLE IN AMERICA

AMERICA'S RACISTS HAVE INFILTRATED AMERICAN POLICE FORCES TO WAGE A RACE WAR AGAINST BLACK PEOPLE IN AMERICA

THE BLACK RACE IS AT WAR

FIRST WORLD WAR:  THE APPROXIMATELY 6,000 YEAR WORLD WAR ON AFRICA AND THE BLACK RACE

Original Post

  This is what I thought happened at Arabian Penisula where there is a separation between Africa and Saudia Arabia.  I used to think it was due to war but now I'm beginning to recognize that it may have been another shift of the ocean plates underneath dividing Egypt. Sudan and Ethiopia away from the penisula causing a sea to replace the rip.  No I don't believe in the splitting of the "sea" myth.  Cuz folks responsible for that fable lie lie lie.  But I do believe that this shift of plates may have caused abandonment issues for people on the other side of that shift which may have triggered a collobration between Africans and Asiatic folks[neantherals] who were migrating Central Asia and the Caucaus Mountains and came up on this slice of land which was beginning to erode from soil to sand as a result of this disconnection from the continent of Africa.  It is the ONLY thing that makes sense.  Which brings me back to the theory that Africans have been on earth for more than 4.5 million years as [civilized people] before the timeline European/Asian scholars say.  I just don't believe 'em.    But!   

 You know all this study and research  is just to justify white supremacy in that they were here before us.  I watch these scientists like a hawk and notice the arrogance of each find.  I do believe there was another continent but not like how they are trying to say it existed.  And just cuz they find fragments of broken plates underneath the water doesn't mean those plates indicate a full continent-mascagar[sp] is a island off the continent of Africa-if the findings are TRUE  then that can only mean that Africa as we know it was much a BIGGER continent than it now is....AND most importantly is evidence that WE been here  longer than neanderthals as civilized beings.   But!  The [white] scientists ARE NOT gonna say that.  If they continue to study this and find that in fact the research proves Africa land breaking off theory...they gonna bury this and say their findings were unsubstaniated.  I  know em.   But if it can be an Atlantis type existence?  Then they are gonna put their white faces on it to claim as their long lost culture like they did with the Minoans DNA which said that the ancient culture were not from Egypt but from Asia Minor[Anatolia] Still don't believe that shyte. Cuz they LIE LIE LIE.   Yet that's what these scientists been doing since its field was founded in the 18th century.  But 

Add Reply

Post
×
×
×
×
Link copied to your clipboard.
×