Skip to comments.Geologic History of North America Gets Overturned
Posted on 04/17/2013 7:05:48 AM PDT by Renfield
t's time to redraw the map of the world during the reign of the dinosaurs, two scientists say.
Picture the U.S. West Coast as a tortured tectonic boundary, similar to Australia and Southeast Asia today. Erase the giant subduction zone researchers have long nestled against western North America. Drop a vast archipelago into the ancient Panthalassa Ocean, usually drawn as an empty void, the kind on which medieval mapmakers would have depicted fantastical beasts.
"Now it fits together," said Karin Sigloch, a seismologist at Ludwig-Maximilians-University in Munich, and lead study author. "We've come up with a pretty different solution that I think will hold up."
With a spectacularly clear look at the remnants of ancient subduction zones under North America, Sigloch and her colleague Mitch Mihalynuk have revised 200 million years of geologic history. The results of their study are published today (April 3) in the journal Nature....
(Excerpt) Read more at news.yahoo.com ...
According to this revelation, when a plate sinks well into the abyss of the earth’s core, down 1,200 miles; it retains some of the original structure it had when it was close to the surface. I would have assumed it would have been disolved by then.
The climate and typography assumptions of the Jurassic and earlier remain.
This has been a result of new discoveries, understanding, and modeling over the past decade or so.
I think it's pretty widely believed that subducted slabs are actually hitting the core-mantle boundary, astonishingly.
“I would have assumed it would have been disolved by then.”
Yeah! Cuz it’s, like, millions of degrees down there right? Somebody said that.
The center of the earth is a nuclear reactor, which is why it has never cooled down. Fission products are created by this nuclear reaction, resulting in an increase in volume as a single atom of one element decays and becomes multiple atoms of other elements.
The author of the linked study is an imbecile.
What exactly motivates the belief and fascination with random kooks instead of actual scientists?
Personally, I think the expanding planet theory is too hilariously stupid not to laugh at it or anyone that gives it any creedence.
There's no evidence the Earth is expanding based on GPS. There are thousands of pieces of evidence that subduction occurs, based on GPS and seismic profiling. Expanding Earth is garbage. Case closed.
Well see that’s because the Bush’s Fault is constantly moving and can’t be pinned down to just one place!
I read a book once, so I’m pretty smart. I think the Earth is like a big tick, except that it doesn’t have to eat anything to get bigger. If you look at pictures of it from space it is round, just like a really big tick that is about to pop.
How ‘bout the hydroplate theory?
I have enough geology background to find that link fascinating and at the same time wonder if it’s complete bullsh_t.
What is absolute BS is the notion that convective currents beneath the lithosphere move the continents. Ever wonder: what about Newton’s Third Law?
Indeed, the science is settled.
Disclaimer: Opinions posted on Free Republic are those of the individual posters and do not necessarily represent the opinion of Free Republic or its management. All materials posted herein are protected by copyright law and the exemption for fair use of copyrighted works.