For a long time, Bermuda has carried with it a certain form of status. Mysterious disappearances. Weird compass stories. That sort of thing.
Put it this fashion — there are enough low-rent documentaries concerning the place and its strange history to maintain low cost TV channels ticking over with content for no less than one other century or so.
Scientists studying the Atlantic island have now solved a much less dramatic mystery that has baffled geologists for years: why Bermuda continues to be sticking up out of the ocean in any respect.
Sorry it’s not the reply to the entire Bermuda Triangle mystery thing (or a proof as to why people wear Bermuda shorts), but it surely’s still interesting. We promise.
The small island chain sits around 650 miles east of North Carolina within the North Atlantic.
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Roughly 64,000 people live there today, perched on land that technically shouldn’t still be sitting quite so high above the encompassing sea floor because it does.
Normally, volcanic islands depend on heat from lively geology deep below the surface to remain elevated. Bermuda’s volcanoes, nevertheless, stopped erupting greater than 30 million years ago.
In geological terms, the island should’ve regularly sunk lower over time. Principally, logic would dictate that it should all be submerged, sitting at the underside of the ocean, Atlantis-style. However it’s not.
As an alternative, Bermuda has remained unusually raised above the deep Atlantic basin for tens of millions and tens of millions of years.
Scientists have now – finally – came upon why. They’ve linked that strange survival to an enormous hidden layer of lighter rock that’s buried beneath the island’s ocean crust.
Researchers William Frazer and Jeffrey Park used greater than twenty years’ price of earthquake recordings gathered from a single seismic monitoring station on Bermuda. Which is, you’ve gotten to confess, an impressively comprehensive and patient solution to solve any sort of mystery.
By analysing the vibrations produced by distant earthquakes, the team was in a position to map rock layers stretching greater than 25 miles beneath the island.
Pressure waves travelling through Earth change behaviour once they hit different materials, apparently.
That then allowed the scientists to work out what lies underground without having to drill massive holes in every single place. Which could well have upset just a few of the locals and visiting tourists.
Their study, published in Geophysical Research Letters, revealed an unlimited slab of lighter volcanic rock sitting beneath Bermuda.
The hidden layer measures around 12 miles thick, roughly the identical length as Manhattan Island from tip to tip. Or half a marathon, depending on how familiar you’re with Latest York City geography.
This rock beneath Bermuda is believed to be around 1.5% less dense than the encompassing mantle material, making it more buoyant and effectively helping the island float higher above the ocean floor.
That doesn’t sound much, but it surely’s significant in keeping with the experts.
Scientists say that the lighter rock formed between 30 and 35 million years ago when hot molten material rose from deep inside Earth, spread beneath the crust after which cooled right into a solid layer.
Those ancient volcanic leftovers are apparently still doing their job today.
Based on the researchers, the buoyancy created by the buried slab perfectly matches the peak of the Bermuda Rise, a large underwater plateau surrounding the island.
The ocean floor there sits around 1,300 to three,300 feet higher than nearby sections of Atlantic crust of the same age.
The Bermuda Rise has long confused geologists because there are not any lively volcanic hotspots underneath it today.
5 weird theories about The Bermuda Triangle
Atlantis tech – Some people imagine that the lost city of Atlantis lies beneath the Bermuda Triangle, creating strange energy fields that interfere with ships and aircraft.
Alien activity – Other folk think that UFOs hidden beneath the Atlantic are chargeable for disappearances within the region.
Magnetic weirdness – One theory claims unusual magnetic fields around Bermuda can confuse compasses and navigation equipment.
Methane gas eruptions – Don’t laugh. This theory suggests giant bursts of methane rising from the ocean floor could suddenly sink ships by changing the density of the encompassing water. What a solution to die, eh?
Time warps and dimensional portals – A number of staunch believers claim that The Bermuda Triangle accommodates distortions in space and time that pull ships or aircraft into other dimensions. As yet, nobody’s managed to return back and make sure it.
What’s even stranger is that the region also accommodates a slight gravitational anomaly attributable to the lighter material hidden below the surface.
Since the buried rock is less dense, gravity in the world is fractionally weaker than it otherwise ought to be.
The ocean surface above the rise even forms a subtle bulge referred to as a ‘geoid anomaly’. Which sounds slightly just like the form of thing a Bond villain would threaten the world with, but is definitely completely natural, apparently. We’ll should take the geologists’ word for that.
The world’s also been long linked to unusually strong magnetic signals attributable to iron and titanium-rich volcanic rocks left behind from Bermuda’s ancient geological past.
Scientists say these magnetic oddities can affect compass readings barely when ships or aircraft pass overhead. Although they’re believed to be harmless.
Researcher William Frazer said this in an announcement about it: ‘Bermuda is an exciting place to check because quite a lot of its geologic features don’t fit the model of a mantle plume, the classic way for deep material to be delivered to the surface.
‘This means that there are other convective processes inside Earth’s mantle which have yet to be well understood.’
Sadly for conspiracy theorists, this still doesn’t explain the Bermuda Triangle stuff. Or the appeal of Bermuda shorts.
Our advice? Don’t hold your breath on either.
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