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#39820 - 08/29/11 10:19 AM Why was Pangea (with Tethys) perfectly circular?
preearth Offline
Senior Member

Registered: 05/22/10
Posts: 370
Why was Pangaea perfectly circular?

The following is a map of Pangaea from the America Association of Petroleum Geologists (AAPG);



The above diagram can still be found at

http://www.searchanddiscovery.com/documents/97019/9701904.gif
http://www.searchanddiscovery.com/documents/97019/index.htm

The AAPG claim their maps of Pangaea are the most accurate ever produced.

Note that Pangaea (together with the shallow Tethys ocean) is neatly circumscribed by a circle.

Why do you think that Pangaea (plus Tethys) fits neatly within a circle?

Remember, the America Association of Petroleum Geologists drew the circle in this diagram, not me.

So; why do you think that Pangaea fits neatly within a circle?

Current geological theories provide no explanation.

However, the PreEarth-Heaven collision provides a simple explanation.

Namely; The impacted area is contained within a circle on the globe (i.e., is circular).

Therefore, the non-impacted area is also within a circle on the globe (i.e., is circular).

The non-impacted area is by definition Pangea (PreEarth-Pangea).

Therefore, Pangea (PreEarth-Pangea) is circular.

To get from PreEarth-Pangea to Earth-Pangea you have to adjust for the fact that Earth has a smaller curvature than PreEarth (PreEarth has a larger curvature than Earth). This adjustment introduces splits. Indeed, if you reduce the curvature of a rigid circular cap (e.g., PreEarth-Pangea), i.e., you flatten it somewhat, then you necessarily introduce splits in the cap.

Therefore, Pangea (Earth-Pangea) is circular with splits.

Where the main split is, of course, the pie-shaped region, called the Tethys ocean.

Read all about the PreEarth-Heaven collision here.
_________________________
Earth formed from a collision
www.preearth.net

Plate-tectonics is wrong
www.preearth.net/plate.html

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#39821 - 08/29/11 10:32 AM Re: Why was Pangea (& Tethys sea) perfectly circular? [Re: preearth]
preearth Offline
Senior Member

Registered: 05/22/10
Posts: 370

Note, that to fully understand what is written above, you need to read the thread;

Mansfield's Earth Formation Hypothesis: Update.
_________________________
Earth formed from a collision
www.preearth.net

Plate-tectonics is wrong
www.preearth.net/plate.html

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#41080 - 10/21/11 12:34 AM Re: Why was Pangea (& Tethys sea) perfectly circular? [Re: preearth]
preearth Offline
Senior Member

Registered: 05/22/10
Posts: 370

So, then? No one is able to give a reasonable explanation (other than the one presented here which involves two planets colliding) for why Pangea was almost perfectly circular.

And,... what does this say about the standard geological theories?

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#41089 - 10/22/11 07:32 PM Re: Why was Pangea (& Tethys sea) perfectly circular? [Re: preearth]
Bill S. Offline
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Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
Pre. Perhaps it has more to do with the possibility that people are reluctant to post in your threads because you tend not to answer questions.
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#41090 - 10/22/11 07:38 PM Re: Why was Pangea (& Tethys sea) perfectly circular? [Re: preearth]
Bill S. Offline
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Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
BTW. Does the theory proffer any explanation for the claim that PreEarth Pangaea was circular?
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There never was nothing.

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#41096 - 10/24/11 01:53 AM Re: Why was Pangea (& Tethys sea) perfectly circular? [Re: Bill S.]
Orac Offline
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Registered: 05/20/11
Posts: 2819
Loc: Currently Illinois, USA
Tend not too ... Has ever answered any of your questions Bill S .... I have seen you pose about 20 so far.


Edited by Orac (10/24/11 01:53 AM)
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#41099 - 10/24/11 01:21 PM Re: Why was Pangea (& Tethys sea) perfectly circular? [Re: preearth]
Bill S. Offline
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Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
Patience, Orac, when answers come the may be worth waiting for.
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There never was nothing.

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#42100 - 01/11/12 12:01 PM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Oph Offline
Junior Member

Registered: 01/11/12
Posts: 9
Originally Posted By: preearth
The AAPG claim their maps of Pangaea are the most accurate ever produced.
Where do they make this claim? Do you think the rough sketch map you have reproduced here represents the accuracy they are talking about? Do you understand this is a sketch map?

Originally Posted By: preearth
Why do you think that Pangaea (plus Tethys) fits neatly within a circle?
It doesn't. There are several areas with positive and negative deviations from circularity.

Originally Posted By: preearth
Remember, the America Association of Petroleum Geologists drew the circle in this diagram, not me.
And why do you think they did that?

Originally Posted By: preearth
Current geological theories provide no explanation.
Don't you believe in chance?

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#42938 - 03/27/12 11:25 AM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
preearth Offline
Senior Member

Registered: 05/22/10
Posts: 370
Oph didn't stick around long. Oh well, he didn't have a clue, anyway.

Originally Posted By: Bill S
BTW. Does the theory proffer any explanation for the claim that PreEarth-Pangea was circular?

I didn't answer this because I thought you couldn't possibly not see the connection. But maybe you really can't see it, even though it is obvious.

The mapping projection mentioned below is the one used by the AAPG (America Association of Petroleum Geologists) in their sketch map of Pangea (the illustration in the first post).

The impacted region was a circular cap, which maps to an annular area in the chosen flat map projection. In fact, the impacted region maps to the annular area of ocean surrounding Pangea (i.e., the region outside the AAPG map circle).

PreEarth-Pangea, which is by definition the non-impacted region, was a larger circular cap, which actually ran over Preearth's equator. PreEarth-Pangea maps to the circular area within the AAPG map circle. That is, PreEarth-Pangea corresponds to Earth-Pangea.

The AAPG map circle itself corresponds to the circle marked in the following animation;



The impacted region is within the circle (ring) in the above animation.

PreEarth-Pangea, i.e., the non-impacted region outside the circle, is pictured here just as it fractures into continents (which will soon be expanded apart to their current positions on the soon to be formed Earth). PreEarth-Pangea, corresponds to all of Pangea in the AAPG map (i.e., the region within the AAPG map circle).

By the way, the difference between PreEarth-Pangea and Earth-Pangea is their curvatures.
_________________________
Earth formed from a collision
www.preearth.net

Plate-tectonics is wrong
www.preearth.net/plate.html

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#42947 - 03/27/12 07:16 PM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Bill S. Offline
Megastar

Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
Thanks for the response, Pre. I still have a sticking point, but I will try to resolve it myself first.
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There never was nothing.

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#43803 - 05/26/12 01:05 AM Re: Why was Pangea (with Tethys) perfectly circular? [Re: Bill S.]
preearth Offline
Senior Member

Registered: 05/22/10
Posts: 370
Originally Posted By: Bill S.
Thanks for the response, Pre. I still have a sticking point, but I will try to resolve it myself first.

Guess you resolved that one.
_________________________
Earth formed from a collision
www.preearth.net

Plate-tectonics is wrong
www.preearth.net/plate.html

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#43809 - 05/26/12 06:20 AM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Ellis Offline
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Registered: 01/08/07
Posts: 1490
Loc: Australia
Perhaps it's easier to draw. :-)

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#43815 - 05/26/12 06:09 PM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Bill S. Offline
Megastar

Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
Originally Posted By: Pre
Guess you resolved that one.


Not yet. Time is still at a premium. If/when I do I will let you know, as there will either be an acknowledgement that I see your point, or another question.
_________________________
There never was nothing.

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#43820 - 05/26/12 08:30 PM Re: Why was Pangea (with Tethys) perfectly circular? [Re: Bill S.]
Blobby2 Offline
Junior Member

Registered: 01/14/08
Posts: 24
Originally Posted By: Bill S.
Originally Posted By: Pre
Guess you resolved that one.


Not yet. Time is still at a premium. If/when I do I will let you know, as there will either be an acknowledgement that I see your point, or another question.


[quote] by Blobby2

Well i got to disagree with a pangea circle like most everybody esle
Even a spinning world is not perfect circle so why do you believe a millions year old continent like pangea was even close to a circle
supposition yes proof no

Thanks Blobby2

[/quote)

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#43822 - 05/26/12 11:16 PM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Ellis Offline
Megastar

Registered: 01/08/07
Posts: 1490
Loc: Australia
I wasn't being entirely facetious when I suggested that it would be easier to draw Pangea as a circle. I know nothing about Pangea except that it contains Gondwanda. It seems to me that it is an ancient idea/myth/ truth which some do not acknowledge as fact, in the form discussed here.

There are many depictions of the ancient worlds and their beliefs, we do not often assume them to be 100% accurate! A circular depiction of a mysterious object makes it even more mysterious and much easier for the story teller to draw. Naturally occurring perfectly circular objects, especially something as big as half a planet would be very unusual indeed. The circle would be easier to explain as a magical, unique event, and it would be easier to depict. (if indeed anyone did).

And what happened to Tethys? It disappeared apart from the title. Did I miss it? If Tethys was really there then Pangea as depicted would not be circular but would look more like Pac-man.

Also the petroleum guys would be only too happy to depict Pangea as circular--- surveying would be a cinch without all those pesky angles.

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#43826 - 05/27/12 11:27 AM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Bill S. Offline
Megastar

Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
Originally Posted By: Blobby2
Even a spinning world is not perfect circle


Somehow I doubt that Pre was talking about that degree of perfection in the circle.

Quote:
why do you believe a millions year old continent like pangea was even close to a circle


Think azimuthal equidistant projection you should find your circle. The problem I have is finding a scenario which does not include a circle. I suspect that Pre’s point, though, is that Pangaea seems to fit very neatly into its circle; not in the way that, for example, a square can be fitted into a circle with lots of extra space.
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There never was nothing.

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#43827 - 05/27/12 11:49 AM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Bill S. Offline
Megastar

Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
Originally Posted By: Ellis
It seems to me that it is an ancient idea/myth/ truth which some do not acknowledge as fact, in the form discussed here.


Even such widely accepted ideas as plate tectonics are obviously not universally held, or there would be four less threads in the GSD Forum. smile

Possibly the main difference between a myth and a scientific idea is that latter requires some reasonable evidence, whereas the former can be sustained on faith alone. Of course, this does mean that the scientific idea can change as new evidence is discovered, but such evidence must be open to criticism and honest discussion. Simply shouting “rubbish” by supporters of either side achieves nothing apart from ruffled feathers.

You seem to be saying that when dealing with ancient worlds a degree of guesswork is bound to be involved. I agree, but it is easy for those directly involved in the evolution of ideas to lose sight of that, and believe they are dealing in absolutes.
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There never was nothing.

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#43828 - 05/27/12 12:03 PM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Bill S. Offline
Megastar

Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
Quote:
Pac-man.


Is it only "ancient Brits" who see Pac-man as the CC41 (utility clothing) sign? smile
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There never was nothing.

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#43832 - 05/27/12 10:33 PM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Ellis Offline
Megastar

Registered: 01/08/07
Posts: 1490
Loc: Australia
Bill S -- That's amazing--the utility sign WAS what I thought of first!!!!! I did not know there was another person here who would recognise it. Here in OZ, no-one would know what I meant.


I have been researching Pangea on line and if seems to me it is a rather controversial topic!!! I still find it hard to believe that the circular feature is any more than any (for example) crater, and is circular-ish but not perfect.

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#43850 - 05/28/12 07:18 PM Re: Why was Pangea (with Tethys) perfectly circular? [Re: preearth]
Bill S. Offline
Megastar

Registered: 08/20/10
Posts: 3570
Loc: Essex, UK
Pre, your AAPG map also shows the Kula and Farallon "plates". In your theory, what happened to these?
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There never was nothing.

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