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Chrome Hyena

Member
Oct 30, 2017
8,768
www.businessinsider.com

Earth tipped over on its side 84 million years ago and then righted itself, new study finds

About 84 million years ago, Earth's crust and the mantle below it rotated around the planet's inner core — causing the Earth to tip over.

If you'd been able to stare at Earth from space during the late Cretaceous, when Tyrannosaurus rex and Triceratops roamed, it would've looked like the whole planet had tipped over on its side.

According to a new study, Earth tilted by 12 degrees about 84 million years ago.

"A 12-degree tilt of the Earth could affect latitude that same amount," Sarah Slotznick, a geobiologist at Dartmouth College and co-author of the new study, told Insider.

It would approximately move New York City to where Tampa, Florida, is right now, she added.

How did it happen?

Prior to the late Cretaceous, the Pacific Plate — the largest tectonic plate on Earth spanning 40 million square miles under the Pacific Ocean — was sinking under another plate to its north. Around 84 million years ago, the Pacific Plate started subducting in a different direction, under another plate to its west. This change "might have very well changed the literal balance of the planet," Mitchell said.


So, NY, you would have had some AMAZING weather year round back then! Also crazy to think an entire continent just vanished, and literally tipped the planet over on its side. Imagine that happened today.
 
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Dekuman

Member
Oct 27, 2017
19,026
What caused the tilt and how did it right itself? If true would this put a spanner in the idea the moon stabilizes our axis ?

Edit: looks like it's plate tectonics
 

subpar spatula

Refuses to Wash his Ass
Member
Oct 26, 2017
22,087
What caused the tilt and how did it right itself? If true would this put a spanner in the idea the moon stabilizes our axis ?

Edit: looks like it's plate tectonics
It is just a rebalance. The plate moved. Shifted the axis, the movement of the planet and plates cause a rebalance.
 
Oct 26, 2017
35,565
Visual demonstration of the event:


penguin-falls-over-rock-gets-back-up-keeps-walking-shakes-it-off-1417710196w.gif
 

Grym

Member
Oct 27, 2017
3,973
You forgot the article link. Is there more to the story I can read or is that it?
 

wolfshirt

Member
Oct 28, 2017
1,160
Los Angeles
Rad! This could be a huge piece of the puzzle to the fabled mid-Cretaceous extinction event that ended the reign of multiple ultrapredator dynasties and led to the rise of T. Rex.

Just wondering though, does the article actually mention anything about continents disappearing? Or is that a guess?
 

Grym

Member
Oct 27, 2017
3,973
So they studied the magnetic orientation of newly formed rock (that orientation is set in stone - har har - when cooled/hardened) to see the shift over time. Huh. Cool.
 
Nov 14, 2017
2,323
Rad! This could be a huge piece of the puzzle to the fabled mid-Cretaceous extinction event that ended the reign of multiple ultrapredator dynasties and led to the rise of T. Rex.

Just wondering though, does the article actually mention anything about continents disappearing? Or is that a guess?
OP has misinterpreted a bit. The article discusses the subduction of the Pacific plate, which doesn't have any continents on it. Bit of background: we can think of the tectonic plates (both continental and oceanic; the lithosphere) as "floating" on the viscous upper mantle (the asthenosphere). Subduction is when the edge of one of these plates pushes up against and sinks underneath the edge of another, due to differences in density (the more dense plate sinks). This is a very slow process that is measured in tens of millimetres per year. In the case of the Pacific plate, it is currently subducting along sections of its western boundary (the Marianas trench is one of these zones) and in the north, creating the Aleutian islands.

This potato quality gif from Wikipedia shows an estimate of the drift of the continents from around 250 million years ago to now, as you can see all the current major continents are present and accounted for:


Pangea_animation_03.gif
 

Wubby

Member
Oct 27, 2017
3,849
Japan!
Timewise I think that also lines up with when the bend in the pacific island chain that runs from the Aleutians to Hawaii happened.

www.mn.uio.no

How the Pacific got its bend - Department of Geosciences

Hawaii sits at the end of a chain of volcanoes running across the Pacific Ocean floor, but in the middle of this chain lies a bend of 60 degrees. For many decades geoscientists have struggled to explain exactly how and why this feature occurred around 50 Million years ago. A new study from CEED...

Some real shit went down in this time period. Would have been interesting to experience.
 

diakyu

Member
Dec 15, 2018
17,525
Okay but hear me out. What if we shift the plates to fix global warming. Just constantly shifting them. Use nukes. I see no issue. You're all welcome.
 

Slayven

Never read a comic in his life
Moderator
Oct 25, 2017
93,051
Dinosaurs floating in space would be kinda cool tho.
Reminds me of Conspiracy X, a table top game. In it the extinction of the dinosaurs weren't cause by a meteor. It was cause by reptilians that evolved along side the dinos testing their warp drive. It fucked it and sucked them into a black hole pocket dimension, and it been slowly spitting them back out. Of course they want their old hood back.
 

MetatronM

Member
Oct 25, 2017
5,851
So, NY, you would have had some AMAZING weather year round back then! Also crazy to think an entire continent just vanished, and literally tipped the planet over on its side. Imagine that happened today.
Gonna have to pass on that Tampa weather. It's called the Lightning Capital of America for a reason, you know.