Talk:Pannotia

Bad external link

The external link section optimistically equates the Late Precambrian Supercontinent of scotese.com with Pannotia - that's like jumping to convenient but inaccurate conclusions to me. As much as I know the existence of Pannotia is contested. We don't know if scotese.com accepts the Pannotia theory. The formulation

This map illustrates the break-up of the supercontinent, Rodinia, which formed 1100 million years ago,

hints that scotese.com might (neither may, nor does) think otherwise... Rursus 14:45, 21 November 2006 (UTC)

I googled  site:www.scotese.com Pannotia , and indeed, the site refers to Late Precambrian in [1] as was it the time when Pannotia was formed. So I retracted the doubts myself. Rursus 16:49, 21 November 2006 (UTC)

External Link

The external link at the bottom of page should be removed. The link is for a map of Rodinia, which formed 1100 million years ago, not Pannotia. A correct map of Pannotia should be added to this page. Thanks! —Preceding unsigned comment added by 24.126.128.40 (talk) 20:21, 27 January 2010 (UTC)

Claimed map at File:Pannotia.svg -- AnonMoos (talk) 00:15, 29 June 2011 (UTC)

North America rifted from China ?

Inexpertly, c.600Ma, Gondwana straddled earth's equator (with S.America & Africa stretching east-west), with Baltica & Siberia close to the southwestern corner of the supercontinent. Meanwhile, North America (Laurasia) lay near earth's equator, about halfway around the globe. Over the next 100Myr, Gondwana trended towards earth's south pole, "coming up on the other side", and colliding into North America, generating a vast sequence of mountain ranges, including the Appalachians. Ipso facto, retrodicting backwards in time, North America would have moved away from Gondwana, vaguely westwards; and Gondwana would have moved away from North America, vaguely northeastwards. Uncritically extrapolated backwards in time, North America could have been in contact with China. Indeed, fossil forams from the Insular Belt in western Canada show that some North American terranes came from (near to) China, hundreds of millions of years ago. Logically, plate motions would have been slow, during the last snowball earth period c.800-600Ma. Prior to that epoch, Gondwana was assembling, from the accretion, of various dispersed proto-continental cratons. Perhaps, in that earlier epoch c.1000-800Ma, amidst various dispersed cratons, Chinese terranes were adjoined to North America ? 66.235.38.214 (talk) 16:27, 29 October 2012 (UTC)

And... this is the encyclopedia anyone can edit, so grab some good references and dive in. Please see Insular Islands and Insular Belt as these were plastered on during the Cretaceous, so not much related to Pannatoia. Also see Omineca Arc which was a bit older Jurassic to Cretaceous. Why would plate tectonics slow down for a bit of ice? Vsmith (talk) 17:31, 29 October 2012 (UTC)

V-shaped Pannotia

I removed the following text from the page. As far as I can tell this is entirely based on this image and most other reconstructions I've seen tell another story. I will hopefully describe the break-up of Pannotia using other sources. --Fama Clamosa (talk) 13:59, 10 January 2016 (UTC)

“ Pannotia looked like a V that faced northeast. Inside the V was an ocean that opened up during the break-up of Rodinia, the Panthalassic Ocean, an ocean that became the early Pacific Ocean. There was a mid-ocean ridge in the middle of the Panthalassic Ocean. Outside of the V was a very large ancient ocean called the Panafrican Ocean that may have surrounded Pannotia, equivalent to the future Panthalassic Ocean.

Pannotia was short-lived. The collisions that formed Pannotia were glancing collisions, and the continents composing Pannotia already had active rifting. By the Cambrian 540 Ma, or only about 60 million years after Pannotia formed, Pannotia disintegrated into four continents: Laurentia, Baltica, Siberia and Gondwana. refUCMP 2009/ref Later, altered landmasses would recombine to form the most recent supercontinent, Pangaea.

”

• "Paleogeography". UCMP Glossary. 2009. Retrieved November 2015. {{cite web}}: Check date values in: |accessdate= (help)

Accuracy of São Fransisco craton label on diagram

In regards to the diagram cited "Pannotia 545 Ma after Dalziel 1997, view centred on the South Pole; rotated 180° relative to the reconstruction of Rodinia above", shouldn't the label for the craton San Fransisco - Congo be São Fransisco - Congo? That is how it is identified in the text and in other entries. Mariner82 (talk) 04:52, 20 October 2017 (UTC)

Yes you're right, it needs to be rewritten. 2601:441:467F:9E00:5159:6913:5889:34D1 (talk) 02:32, 14 March 2020 (UTC)