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Is the name Ur derived from the same source as Ur-heimat, etc, thus meaning original/proto?
I'm not certain all continents had to accrete? In early Earth, continental crust was first formed by deep mantle plumes. Before this, iron and nickel had to first sink to form the iron metallic core and then this gave rise to the double layered convection circulation for plate tectonics to begin working. Even before this process began ca. 4.4-4.3 Ga?, continental crust began to form from the the volcanic plumes. No plate tectonic system could have occurred until the iron core was formed and the upper mantle circulation belt began to work. Couldn't there have been one large accumulated mass or a host of converging lava flows and crustal formations? Valich 16:44, 24 July 2006 (UTC)
-- — Ŭalabio 02:14, 2005 Apr 7 (UTC)
Unless there are any objections, if I can find the evidence - locate enough sources - or if and when evidence becomes available - maybe it never will - to show that the Yilgarn craton was actually the first landmass, then I'm going to write an article proclaiming Yilgarn as the first continent, depending on what other firsthand research sources state and call it? That means 4.4-4.3 Ga.
Is Ur continent or supercontinent? In the "continents of the world" box, it says Ur is a supercontinent, yet in this article, it is written as a continent. M&NCenarius 02:05, September 8, 2006 (UTC)
The information on this page does not seem to be consistent with that provided on Supercontinent Cycle, which lists Ur as just one of several supercontinents, and not the first. I'm no expert, but it seems like these pages need to be reconciled. Mperrin 17:24, 2 April 2007 (UTC)
Text says "Ur survived for a long time, until it was first torn apart when the supercontinent Pangaea broke apart". Ur last until Pangaea broke apart? How can that be? Was it Ur or Pangaea? CsikosLo 17:22, 11 July 2007 (UTC)
This article is contradicted by Vaalbara and Supercontinent cycle as to being the first continet. 76.66.202.139 ( talk) 15:14, 5 May 2009 (UTC)
I've been working on the Vaalbara article and felt it important to mention that there is theorized prior supercontinent. Bettymnz4 ( talk) 01:57, 7 March 2010 (UTC)
This article needs a picture — Preceding unsigned comment added by Omni314 ( talk • contribs) 20:27, 9 October 2011 (UTC)
I removed this time-line from the article since it is unreferenced, at least partly incorrect, and not very informative. -- Fama Clamosa ( talk) 10:43, 26 March 2016 (UTC)
“ | All dates below are approximate.
|
” |
This
level-5 vital article is rated Start-class on Wikipedia's
content assessment scale. It is of interest to the following WikiProjects: | |||||||||||
|
It is requested that a geological diagram or diagrams be
included in this article to
improve its quality. Specific illustrations, plots or diagrams can be requested at the
Graphic Lab. For more information, refer to discussion on this page and/or the listing at Wikipedia:Requested images. |
It is requested that a global map or maps be included in this article to improve its quality. |
Is the name Ur derived from the same source as Ur-heimat, etc, thus meaning original/proto?
I'm not certain all continents had to accrete? In early Earth, continental crust was first formed by deep mantle plumes. Before this, iron and nickel had to first sink to form the iron metallic core and then this gave rise to the double layered convection circulation for plate tectonics to begin working. Even before this process began ca. 4.4-4.3 Ga?, continental crust began to form from the the volcanic plumes. No plate tectonic system could have occurred until the iron core was formed and the upper mantle circulation belt began to work. Couldn't there have been one large accumulated mass or a host of converging lava flows and crustal formations? Valich 16:44, 24 July 2006 (UTC)
-- — Ŭalabio 02:14, 2005 Apr 7 (UTC)
Unless there are any objections, if I can find the evidence - locate enough sources - or if and when evidence becomes available - maybe it never will - to show that the Yilgarn craton was actually the first landmass, then I'm going to write an article proclaiming Yilgarn as the first continent, depending on what other firsthand research sources state and call it? That means 4.4-4.3 Ga.
Is Ur continent or supercontinent? In the "continents of the world" box, it says Ur is a supercontinent, yet in this article, it is written as a continent. M&NCenarius 02:05, September 8, 2006 (UTC)
The information on this page does not seem to be consistent with that provided on Supercontinent Cycle, which lists Ur as just one of several supercontinents, and not the first. I'm no expert, but it seems like these pages need to be reconciled. Mperrin 17:24, 2 April 2007 (UTC)
Text says "Ur survived for a long time, until it was first torn apart when the supercontinent Pangaea broke apart". Ur last until Pangaea broke apart? How can that be? Was it Ur or Pangaea? CsikosLo 17:22, 11 July 2007 (UTC)
This article is contradicted by Vaalbara and Supercontinent cycle as to being the first continet. 76.66.202.139 ( talk) 15:14, 5 May 2009 (UTC)
I've been working on the Vaalbara article and felt it important to mention that there is theorized prior supercontinent. Bettymnz4 ( talk) 01:57, 7 March 2010 (UTC)
This article needs a picture — Preceding unsigned comment added by Omni314 ( talk • contribs) 20:27, 9 October 2011 (UTC)
I removed this time-line from the article since it is unreferenced, at least partly incorrect, and not very informative. -- Fama Clamosa ( talk) 10:43, 26 March 2016 (UTC)
“ | All dates below are approximate.
|
” |