Talk:OGF:Plate tectonics

From OpenGeofiction Encyclopedia
Jump to: navigation, search

Plate tectonic maps by area and version.

UPLOAD PLATE TECTONIC MAPS, LINK TO THEM AND DISCUSS HERE


V1 (old world) 09/07/2016

Tectonics old world 090716.png

Uploaded by Yuanls - see discussion in diary entry [here].


As a geology student I love the idea of creating a coherent plate tectonics system. I also think that it would be nearly impossible to do in OGF, because it seriously impedes to creative freedom of the users to create their own geography for their country.

If I take the stuff other people have created as an example here, especially in western Uletha, I already spot some problems with the map above. I also think that these problems will be there in any other attempt to create a plate tectonic system for the OGF world and this should not be considered at a specific criticism at the map above.

If I remember correctly the country of Belphenia has a mountain of more than 10km high near its border. That is already an unrealistic hight, mountains cant get higher than about 9km, they will simply collaps under their own weight if they get higher under the gravity on earth and I presume the OGF-world. But even if you would make the mountain 9km high, the map above will be simply impossible, the nearest tectonic activity is a divergent plate boundry in the south and such a mountain would need some serious continent on continent collision. The whole convergent boundry to the north would need a continuous line of magmatic arc islands or at least some serious vulcanic activity and although the islands to the east seem to be fitting this senario the rest of the plate boundry is highly unrealistic. Furthermore (I know its just a sketch...) there are just loose boundries but no discrete plates. The plate in the middle of Uletha seems to have convergent plate boundries in two different directions, at least one of them should be a transform fault, otherwise it will be really had to create a plausible system.

There also seems to be a fair amount of rifting under islands, which would be rather unusual, because rift valleys usually start in the middle of large continents because the heat that is adiabatically transported from the core to the lower lithosphere has nowhere to go because the large continent acts like a giant blanket. The subsequent heat drastically weakens the lithosphere and either creates a riftvalley or if the rifting continues a new Mid Ocean Ridge. There are more things that dont make sense, but I think you get the idea.

Although you possibly can think of a system that geologically makes sense and would explain the shape of the OGF world, my main concern is that this would be a really big obstacle to the creative freedom people have in choosing, where to place mountains, valleys and local climates. Tectonics are main force that shapes how the large geographical features in the world look. In my region of the map (Astrasia, part of Archanta) there also seems to be a rifting zone, but if I look at what people have written in the wiki and created on the map I think an old collision zone/convergent boundry would be more appropriate. It is gonna be hard to create something that is both correct and pleasing to all users.

--TRJ (talk) 00:06, 10 July 2016 (CEST)


Great comments, thanks TRJ. I appreciate your thoughts about how other users may be affected, but look at it this way: if something gets mapped by someone in one territory, it affects the territory next door. As more of the OGF world gets filled up, these constraints increase, until it becomes pretty impossible for the whole thing to be believable. I got the feeling that was one of the main reasons behind wanting to make a coherent world geology map. But I also understand that this is more important for some than for others. Another point: if a basic global geology map did exist, new territories could be chosen bearing in mind some of these things - like 'I want to map big volcanoes' or 'I want a mountain range and an offshore trench' etc.

Anyway. Your points: could you possibly sketch some of them onto the blank - or the more recent version? That would really help visualise it.

I had exactly the same thoughts as you about Belphenia (inc. the 10km mountain). There is some info somewhere about Belphenian geology - but its not on the Belphenia page. I'm sure User:BelpheniaProject would be happy to help. If we can come up with the most convincing explanation for big mountains and vulcanism in that peninsula, that is probably be the best thing to go with.

--Udilugbuldigu (talk) 01:13, 10 July 2016 (CEST)


This was only a rough sketch of possible and visible boundaries, and I was aware of most of its faults (sorry). Yeah that western boundary in north Uletha is supposed to be a divergent fault; I did correct it but I guess I uploaded an old version. I was cautious not to make it too detailed in case it was changed completely or rejected though. Change it as you wish and I'm sure a more realistic version will arise from mine. Some short boundaries were extended and linked together, which would explain the lack of geological features on the map. However, if approved, they can be created. What time period I envisaged was that around 100-200 ish million years ago there was a supercontinent, which has begun to fragment. These are my basic thoughts on the subject.

Yuanls (talk) 02:35, 10 July 2016 (CEST)


I just want to add that I do appreciate that you had put some thought into this in the first place. I was just reading back my own comment, and it seems that criticism in writing always sounds a bit harsher than if you said it to someone face to face. I don't want it to look like I am just bitching about other people's hard work. Your map is a great first step, but it could use a lot of improvement.

The same is true for the user that created Belphenia, you created an intruiging country and if you want to have a big ass mountain, don't let my geological objections stop you. --TRJ (talk) 02:38, 10 July 2016 (CEST)


Faults.jpg My layout for Pretany Bhj867 (talk) 02:40, 10 July 2016 (CEST)


Are the black lines some kind of giant pull-apart-basin? --TRJ (talk) 04:09, 10 July 2016 (CEST)


The Black lines are the continental divide. Pretanic Lake, or the Inara Basin is a caldera following a line of ancient eruptions. Think of it like yellowstone, but with more complicated continental rifting involved. It is not a typical hotspot. [1]Bhj867 (talk)

I don't know the answer to that question - it looks like a big rift to me but not sure. This is been a good discussion so far - so lets not worry too much about criticism, its all meant constructively. For example, I'm happy to say that I think 10km high is almost physically impossible for a mountain, given earth's gravity and the rate of crustal movement that would be needed to form it. I would say 6-7km might be feasible, and would still be a pretty impressive peak. Big ass if its erupting, that's for sure.

I like the idea of a fragmenting supercontinent. Thinking longer term, a recent break up of a supercontinent might also help with some of the anomalies that are sure to turn up with plants and animals with 'unrealistic distributions'. Animals and plants would have been much better able to get about than in the real world, so we wouldn't need to stick so strictly to 'indigenous' floras and faunas.

Maybe we could use the fragmenting idea and work out some rough estimations of rates of continental drift, and of when these rifts started to form. Perhaps we should also consider the marine area between Uletha and Archanta. Is this opening up, or closing? If there is a plate subducting under Belphenia, it would probably be closing up. So perhaps Antarephia has been a separate continent, not part of this supercontinent (or maybe part of the 'new world' if that is to be considered another supercontinent?)

I'm assuming that with the ocanic plates there could be volcanic hotspots pretty much anywhere - so volcanic islands like Onnutu and the Fire Islands N of Shadze-Ma would be fairly easy to explain?

There is a likely to be a subducting plate SE of Paxtar, so that whole of that SE side of Antarephia is probably also a convergent plate boundary. There may be a way to continue the line that starts in Mahhal all the way up the SE side of Antarephia. Thoughts?

Sorry I've not had time to sketch these ideas.

Please, tag your name and mark with 4 '-' after you post to clarify who said what.

--Udilugbuldigu (talk) 04:13, 10 July 2016 (CEST)


See comments in User Diaries discussion. --Isleño (talk) 18:35, 10 July 2016 (CEST)


What about creating smaller plates connected to the smaller ones?

--adminero_us (talk) 15:13, 10 July 2016 (CEST)


Do you mean 'What about creating smaller plates connected to the larger ones? Or are we talking 'fractal plates'--Udilugbuldigu (talk) 01:45, 11 July 2016 (CEST)


Midcontinent rifting.jpg My take on the worlds crustal plates. (west) Red are plate boundaries, yellow are mid continental rifting. Bhj867 tag here


The oceanic plate boundaries would be rifting i.e. divergent plate boundaries - if so that matches my thoughts for Asperic pretty closely. Good. How do you envisage the plate boundary running south of Castellan out east to Khaiwoon? If its subducting, I'd expect big mountains all along that continental margin, but I'm not sure they are there; Gobrassanya & Alora maybe (but I haven't checked).

Would be better if you could sketch on the blank, at top - very hard to see on this one on my (admittedly small) screen.

--Udilugbuldigu (talk) 04:51, 11 July 2016 (CEST)


I will see what I can do. There is some tweaking that I can do. Yes I envisioned the peninsula a huge subduction zone, yes. Faults white.jpg

Blue is a subduction zone, green is a mid continental rift, red is a plate boundary either stable, moving, or rift in the oceans Bhj867 (talk) 05:23, 11 July 2016 (CEST)


Thanks Bhj867, this is slowly coming together. I'll have another look later.

For those of you who are not sure plate tectonics is necessary, I've added to the diary entry to explain a bit better why I think it is. --Udilugbuldigu (talk) 19:30, 11 July 2016 (CEST)


OGF faultlines 2.png An updated scribble

Red are convergent/subducting plate boundaries, blue are divergent plate boundaries (not showing transform faults), orangey-brown are complex/uncertain boundaries.--Udilugbuldigu (talk) 01:47, 13 July 2016 (CEST)


Continuing discussion in the diary entry, not sure exactly where its going - I think with a map along the lines of the one above we are still able to have an overview of tectonics, but without restricting mappers too much. I've you've thoughts, post them--Udilugbuldigu (talk) 12:55, 14 July 2016 (CEST)


Commonian faultlines.png Thought of having some fault lines through Commonia and past Rhododactylia, as I doubt not only Commonia's Chaotic State is just due to human errors like Chiano Lu or other factions etc., but also earthquakes and other natural disasters.

Is a transfrom plate boundary along the South Commonian Border feasible? --Zhenkang (talk) 08:04, 8 January 2017 (CET)

South Astrasian Rift

I think the idea of a rift valley in the southern part of Astrasia might have merit. That should tie together the mountain chain, and the lakes that dot the sub-continent Turnsole80 (talk) 21:11, 13 June 2017 (CEST)

Commonian faultlines 20170614.png

Hi,
Well, I have drawn the moutains in my country (Triaquia) as continental collision mountains - so there are no volcanoes and no rift valley with lakes as in rift areas for example, but I imagine mountains with folds and thrust faults.
Maybe the mountains in your country could be a bit older, so the collision is already done; the mountains are collapsing (or have collapsed) and the lakes are due to late orogenic extension that create extensive basins with lakes (for example like the Basin and Range Province in USA) and probably volcanism... finally it's a bit similar to a "true" rifting but the contexts are not the same. What do you think about it?
Acubens71 (talk) 01:12, 15 June 2017 (CEST)
Hey that just might work! I was looking at the the process that formed the western United States whilst I was researching the above map yesterday. So yes, that might just work, and it's far less disruptive than a rift valley on all the countries in our subcontinent. How would it look on a tectonic map? Turnsole80 (talk) 01:28, 15 June 2017 (CEST)
I'd like to second Acubens71's proposal as an explanation. It has merit and is most certainly plausible. That said, I think we should back up to Udi's proposal and start modifying from there. There are a lot of things that don't make geological sense that trickled in–especially in eastern Uletha, where I care the most about what's going on. Udi really worked through some bugs to give something that is logical, sound, and not infringing upon new users. That's the three-part key here. The resistance expressed in the above-linked diary entries is about codifying this too detailedly for when users come and go. I think there's plenty of work that we can do here, so I'm in; we need to be careful that we're not micromanaging too much for future users. — Alessa (talk) 02:02, 15 June 2017 (CEST)
Yep, that sounds like a very good idea. I look forward to Udi's thoughts on all this. Turnsole80 (talk) 02:17, 15 June 2017 (CEST)
Problem with rift valleys is that they're continent-scale features; imagining one affects all the other countries and potential countries nearby. More generally on a world scale, I think what we should be looking to create is a way to explain why different parts of the world share more than they might to in the real world. For example, why things like bears and conifers may appear to be distributed worldwide rather than confined to certain areas of the planet - as they are in the real world. To bring this back to tectonics, that probably means we should imagine the break-up of a supercontinent more recently in the real world past. Oceanic rifting helps do this without affecting what people want to imagine in their countries. Specifically in S.Astrasia, there could be an ongoing continental collision, the scale - and timescale - of which would determine the topography. Acubens71's ideas look like they reflect this pretty well, and it gives other countries the opportunity to play around with it without being too disruptive. I'd support those ideas. The current sketch for E.Uletha and Archanta Minor doesn't look particularly logical to me - we need to come back to that.--Udilugbuldigu (talk) 10:25, 15 June 2017 (CEST)


Plate map.jpeg

Here is a map of different plates around the world, including Ereva, Kartumia, Orano, and Pelanesia. This map shows where the plates are on the map. Anyone is free to add on and edit this image as they please. As you know, the plates show how continents move overtime, also causing topography to be developed, as plates move together. I made this map to specifically show the position of plates and where plates were and will be over time. The planet's plates have not been fully developed, so this image may not be entirely accurate. Many adjustments may be made in the future, as plate tectonics will change.

The reason of the separation of Tarephia and Anterephia is that the southern Tarephian shores and northern Antarephian shores share a common pattern of parallelism and similarity. Using knowledge of plate movements, and similarity of continents, the plates may be moving away from each other. Tarephia and Antarephia may have been joined together many millions of years ago as a "Super-Tarephia" due to the facts recently stated. This pattern is also present in Archanta Minor and Astrasia. They also may have been joined together. Uletha may be composed on more than one tectonic plates, which will need to be adjusted if true.

This image is not the truth, as plate tectonics are currently being discussed. User:Geoc3ladus User talk:Geoc3ladus 20:53, 14 Nov 2019


Images from space

Hi everyone, I was quite motivated this week end and made a couple of representations of the planet, including one showing the oceans bottom and the oceanic ridges.But once again, please don't consider it as THE truth, this is just imagery with almost no link with what you guys had done so far. Because, unfortunately, I found that page about plates tectonics after drawing those maps. :( I notice that a couple of things match with the previews maps proposed here but some others are really different. Well, just hope you guys will like it.

Oceans bottoms.jpeg
http://wiki.opengeofiction.net/wiki/images/6/61/Oceans_bottoms.jpeg
Oceans bottoms globes.jpeg
http://wiki.opengeofiction.net/wiki/index.php/File:Oceans_bottoms_globes.jpeg

Cheers ! --Rémi (talk)

So you found this page just as I wrote on the Talk:World_climate page. You're one step ahead. On these images - also great. I like what matches up with the previous tectonics discussion, less sure about what doesn't ;)--Udilugbuldigu (talk) 00:09, 1 August 2017 (CEST)

Another reference for other proposals can be looking at the map of known mountains here. There is a certain pattern there, so I believe there should be some revisions to the convergent boundaries.--Happy mapping and may God bless you, ZK (talk) 04:33, 3 March 2018 (CET)