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Tectonic plate 'peeling apart' could 'shrink' the Atlantic, scientists say
FoxNews.com/Science ^ | May 9, 2019 | James Rogers | Fox News

Posted on 05/09/2019 12:57:57 PM PDT by ETL

In their research, the scientists point to an earthquake that occurred off the coast of Portugal in 1755, which destroyed the city of Lisbon, and a 7.9-magnitude quake that struck the Portuguese capital in 1969.

Duarte describes the newly-found “structure” in the tectonic plate as “a very good candidate” for the source of these events.

“The 20 upper kilometers [12.4 miles] of the plate is made of soft rocks that are light and the bottom is dense and heavy (because the plate is very old, more than 100 million years),” Duarte told Fox News.

“This causes this lower part to detach from the upper part and sink in the mantle by the pull of gravity," he added, noting that the process is aided by the infiltration of water that softens the upper part of the plate. ..."

As for a “shrinking” Atlantic Ocean, Duarte noted that oceans are “born,” and then spread, before eventually closing to form a new supercontinent, in what is known as the supercontinental cycle.

The Atlantic, for example, was formed from the breakup of the supercontinent Pangea, then “spread” to assume its current form.

“It makes sense that a new supercontinent will form in the future as the result of the closing of the Atlantic,” Duarte added.

Estimates suggest that the new supercontinent, Pangaea Proxima, will form in around 200 million years.

“But for that to happen, new subduction zones have to form in the margins of the Atlantic,” he said.

“What we may be witnessing here is precisely the birth of a new subduction zone that may spread over the entire Atlantic which will eventually lead to its closing.”

(Excerpt) Read more at foxnews.com ...


TOPICS: Chit/Chat; Science
KEYWORDS: atlanticocean; catastrophism; continentaldrift; pangaea; pangaeaproxima; portugal
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To: 75thOVI; Abathar; agrace; aimhigh; Alice in Wonderland; AnalogReigns; AndrewC; aragorn; ...

61 posted on 05/10/2019 12:13:44 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: fieldmarshaldj

Somehow, yeah, I can. :^) That one really cleaned house:

https://www.imdb.com/title/tt0075686/awards


62 posted on 05/10/2019 1:02:27 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: SunkenCiv
Hardcore SW fans never forget this "injustice !" ;-D
63 posted on 05/10/2019 1:25:47 AM PDT by fieldmarshaldj (BUTTGIGGITY ! It's an anal thing. You wouldn't understand.)
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To: All
Here, again, from a followup (LiveScience) article that I posted, is the main point of the new (primary) article at the top of the thread...

"Understanding how subduction zones start is a long-lasting mystery in plate tectonics, said lead study author João Duarte, a research fellow at Monash University in Melbourne, Australia."

"Subduction zones are key players in creating supercontinents and opening and closing Earth’s oceans.

In a subduction zone, one of Earth’s tectonic plates dives beneath another, sinking into the mantle, the layer under the crust.

As oceanic crust disappears, continents may draw closer together and collide, as has happened numerous times in the history of the planet.

Subduction zones also spawn the biggest earthquakes on the planet, as in Japan, Chile and Alaska. ..."

https://www.livescience.com/37418-subduction-zone-forming-off-spain.html

64 posted on 05/10/2019 2:06:57 AM PDT by ETL (REAL Russia collusion! Fake Dossier, Uranium-1 Deal, Missile Defense, Iran Deal, Nukes: Click ETL)
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To: fieldmarshaldj
Yeah, it must really sting around this time of the year, right after May the 4th.

65 posted on 05/10/2019 10:21:22 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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To: ping jockey

Me & you both...my #1 fave.


66 posted on 05/10/2019 11:26:00 AM PDT by Magic Fingers (Political correctness mutates in order to remain virulent.)
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To: kaehurowing

I think some turnbuckles and cables should fix this crisis.
Just need taxes raised to start.


67 posted on 05/10/2019 8:47:48 PM PDT by minnesota_bound
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To: SunkenCiv
The digital age map of the ocean floor shows spreading, not shrinking...


68 posted on 05/10/2019 9:18:15 PM PDT by Fred Nerks (FAIR DINKUM)
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To: Fred Nerks
Thanks FN!

69 posted on 05/11/2019 12:05:18 AM PDT by SunkenCiv (Imagine an imaginary menagerie manager imagining managing an imaginary menagerie.)
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