Free Republic
Browse · Search
General/Chat
Topics · Post Article

Skip to comments.

How the American West was made -- a new view of plate tectonics
LATimes ^ | April 3, 2013, 3:49 p.m. | Monte Morin

Posted on 04/03/2013 9:43:54 PM PDT by BenLurkin

It's long been held that North America's rugged and mountainous west was formed by the movement of the undersea Farallon plate, and that the process was roughly similar to the way groceries pile up at the end of a supermarket conveyor belt.

Now however, a study published Wednesday in the journal Nature argues that the process involved not just one but several plates that remain hidden deep within in the Earth's mantle.

Scientists at Ludwig Maximilians University in Munich and the British Columbia Geological Survey used earthquake shockwaves, or seismic tomography, to create a three-dimensional map of these massive plate relics, which have sunk 500 to 1,200 miles beneath the Earth's surface.

The plate slabs, according to lead author and geophysicist Karin Sigloch, resemble near-vertical walls, hundreds of feet thick.

"The largest wall runs from northwest Canada to the eastern U.S.A. and on to Central America, and has been called the Farallon slab, one of the most massive features in global tomographies," authors wrote.

"We argue that in fact most of this slab wall is not Farallon and subdivide it into the Angayucham, Mezcalera and the Southern Farallon components."

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


TOPICS: Science
KEYWORDS: catastrophism; earthquakes; lunarorigin; moon; platetectonics; tectonics
Wish I knew what this means for potential earthquakes.
1 posted on 04/03/2013 9:43:54 PM PDT by BenLurkin
[ Post Reply | Private Reply | View Replies]

To: BenLurkin

What does this mean for biotic/abiotic Hydrocarbon formation?


2 posted on 04/03/2013 9:51:09 PM PDT by Paladin2
[ Post Reply | Private Reply | To 1 | View Replies]

To: SunkenCiv
This 3-D image renders the mountainous topography of the western U.S. and the ancient oceanic plate from the surface down to a depth of 1,500 kilometers (color changes in depth increments of 200 km). (Karin Sigloch / Nature / April 3, 2013)
3 posted on 04/03/2013 9:53:08 PM PDT by BenLurkin (This is not a statement of fact. It is either opinion or satire; or both)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Paladin2

I think this is all deeper than we can drill.


4 posted on 04/03/2013 9:54:21 PM PDT by BenLurkin (This is not a statement of fact. It is either opinion or satire; or both)
[ Post Reply | Private Reply | To 2 | View Replies]

To: BenLurkin
Deeper than the CIA can drill?

MOHO?

5 posted on 04/03/2013 10:02:40 PM PDT by Paladin2
[ Post Reply | Private Reply | To 4 | View Replies]

To: BenLurkin

I think it is pretty safe to say that this discovery will have no bearing on future earthquakes and that they will continue unabated.


6 posted on 04/03/2013 10:17:51 PM PDT by Sequoyah101
[ Post Reply | Private Reply | To 1 | View Replies]

To: BenLurkin

“The plate slabs, according to lead author and geophysicist Karin Sigloch, resemble near-vertical walls, hundreds of feet thick.”

Near vertical plates buried deep within the continental crust... sounds kind of like Hydroplate theory.


7 posted on 04/03/2013 10:58:46 PM PDT by Boogieman
[ Post Reply | Private Reply | To 1 | View Replies]

To: BenLurkin
...the process was roughly similar to the way groceries pile up at the end of a supermarket conveyor belt.

I suspected all along there had to be a reason all the loose junk and damaged goods ended up in San Francisco and Los Angeles.

8 posted on 04/04/2013 2:43:18 AM PDT by Standing Wolf
[ Post Reply | Private Reply | To 1 | View Replies]

To: BenLurkin

9 posted on 04/04/2013 2:49:42 AM PDT by JoeProBono (A closed mouth gathers no feet - Mater tua caligas exercitus gerit ;-{)
[ Post Reply | Private Reply | To 1 | View Replies]

To: Sequoyah101

“I think it is pretty safe to say that this discovery will have no bearing on future earthquakes and that they will continue unabated.”

I think you’re wrong. I think it’s the final piece of knowledge necessary to perfect the earthquake machine being built in Area 51.


10 posted on 04/04/2013 11:15:25 AM PDT by catnipman (Cat Nipman: Vote Republican in 2012 and only be called racist one more time!)
[ Post Reply | Private Reply | To 6 | View Replies]

To: catnipman

You’re way ahead of me. I guess that is why I don’t have an earthquake machine yet either.

Had I only known that this piece of knowledge was all that was needed to fill in the blanks.


11 posted on 04/04/2013 11:44:29 AM PDT by Sequoyah101
[ Post Reply | Private Reply | To 10 | View Replies]

To: BenLurkin; 75thOVI; agrace; aimhigh; Alice in Wonderland; AndrewC; aragorn; aristotleman; ...

Thanks BenLurkin.


12 posted on 04/04/2013 6:45:24 PM PDT by SunkenCiv (Romney would have been worse, if you're a dumb ass.)
[ Post Reply | Private Reply | View Replies]

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.

Free Republic
Browse · Search
General/Chat
Topics · Post Article

FreeRepublic, LLC, PO BOX 9771, FRESNO, CA 93794
FreeRepublic.com is powered by software copyright 2000-2008 John Robinson