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Continental drift; How continental drift will carry out
Topic Started: Dec 12 2015, 11:10 AM (2,092 Views)
CaledonianWarrior96
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Hey guys. I'm having a bit of trouble trying to make maps for future continents and I was wandering if anyone here knew any ways or websites that can help you make your own maps. I'm just trying to get a visual idea of what the continents would like in the future at differen times (eg 50 million ACE, 100 million ACE, 250 million ACE etc...).

I have my own theories on what the continents would look like given our current knowledge of plate tectonics, where the continents are moving now and how fast they are and subduction/plate growth zones.

Any help is appreciated. Thanks :)
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CaledonianWarrior96
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Cheers Dorito.

Also is there any way for continental drift to be speeded up by tectonic processes? I've been thinking out Antarctica's drift and began to wonder if there are processes that can speed up the rate of tectonic plates moving
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Zorcuspine
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CaledonianWarrior96
Apr 5 2016, 03:54 PM
Cheers Dorito.

Also is there any way for continental drift to be speeded up by tectonic processes? I've been thinking out Antarctica's drift and began to wonder if there are processes that can speed up the rate of tectonic plates moving
There has to be something, because I know India's collision with Asia happened far faster than it should have, but I don't know the reasons behind it.
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El Dorito
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The main driving force of plate tectonics is gravity in the form of subducting slabs of ocean crust. If you look at what was where India is now in the late Cretaceous before the collision, there was rapid subduction at the Tethys trench, which pulled India north as if it was on a massive conveyor belt. Mid ocean ridges are kind of a biproduct.
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Does anyone have like, a site that shows you what the world will look like in a certain part of the Future?
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El Dorito
Apr 5 2016, 08:47 PM
The main driving force of plate tectonics is gravity in the form of subducting slabs of ocean crust. If you look at what was where India is now in the late Cretaceous before the collision, there was rapid subduction at the Tethys trench, which pulled India north as if it was on a massive conveyor belt. Mid ocean ridges are kind of a biproduct.
It's probable that could happen the same with Australia and new zealand?
In scenarios of continental drift like Amasia, this subcontinent is always presented as the first move into the north toward Northeast Asia, in a relatively short time, in less than 100 million years.
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CaledonianWarrior96
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Going back to what Dorito said about gravity, I read it might have also been due to the decreasing thickness of the Indian plate which caused it to move faster as thinner plates move faster
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Dragonthunders
Apr 5 2016, 09:22 PM
El Dorito
Apr 5 2016, 08:47 PM
The main driving force of plate tectonics is gravity in the form of subducting slabs of ocean crust. If you look at what was where India is now in the late Cretaceous before the collision, there was rapid subduction at the Tethys trench, which pulled India north as if it was on a massive conveyor belt. Mid ocean ridges are kind of a biproduct.
It's probable that could happen the same with Australia and new zealand?
In scenarios of continental drift like Amasia, this subcontinent is always presented as the first move into the north toward Northeast Asia, in a relatively short time, in less than 100 million years.
From what I've seen, it seems that New Zealand is getting a subduction place on its eastward side, so it'll probably just go off on it's own. There's still a chance that it'll crash into some continent, but I think the chances may be a bit slim. In regards to Australia, there's a chance that it'll move northwestward at an increasing rate. Just to note, it's important to remember that continental plates are prone to cracking apart and joining together, so you can have a little more lee-way if you take enough time for your changes.

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Going back to what Dorito said about gravity, I read it might have also been due to the decreasing thickness of the Indian plate which caused it to move faster as thinner plates move faster


While gravity definitely has most to do with tectonic movement, I do want to point out that convection currents also have quite a bit of say on where the plates go--still, the two processes are interconnected. Still, I believe you could have a sudden upwelling of magma along a divergent plate boundary that might cause the convection currents to change their pattern enough to make Antarctica move faster.

This wouldn't be hugely significant however, so remember that even with a change in convection currents, the Antarctican continent wouldn't be able to move to the North pole in like a few million years or something. It just would mean that Antarctica might shift slightly more out of its current position.
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El Dorito
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Just to note, it's important to remember that continental plates are prone to cracking apart and joining together, so you can have a little more lee-way if you take enough time for your changes.


Continents are only prone to cracking if they are very large and cover a big area of the earths surface. They don't just randomly split unpredictably. And the future is more likely to be dominated by increased continental convergence than continued breakup of whats left of Pangaea. The supecontinent cycle is a real thing, and we are pretty much right in the middle of it.
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whachamacallit2
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I'm well aware of the supercontinental cycle, but I'm talking about smaller, more temporary splits. The continents are heading towards a supercontinental formation, but that won't stop continental regions from getting sheared off as the continents move together. That happens all the time, as I'm sure you're aware.
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LittleLazyLass
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From what I've seen, it seems that New Zealand is getting a subduction place on its eastward side, so it'll probably just go off on it's own.
Will this have any effect on it's current trend of rising back up?
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Well, it's still rising, so I bet that New Zealand is just gonna become larger as time goes on. The subduction of the Pacific plate means a pretty serious continental arc is developing, so volcanoes are going to make Zealandia rise again
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El Dorito
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Most of the subduction near New Zealand is actually north of it along the Kermadec subduction zone, not on the continent itself. Also nothing I've seen says New Zealand is moving away from Australia, the old rift in the Tasman sea became inactive around 45 million years ago, so there is no divergence at current. There is also a forming subduction zone starting in the southern ocean below the South Island that is actually facing towards Australia, meaning if anything the two continents will converge in the future.
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whachamacallit2
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Huh, didn't know that. Thanks for setting me right there. I still assume that Zealandia is still going to rise again, though, since orogeny is just orogeny, no matter where it's building up.
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Sorry to drag Antarctica baack into here but what do we know about the tectonic processes of the continent now, other than the direction. Like do we know if there is evidence that shows it's movement will speed up, remain the same, turns out to be the last stronghold for the dinosaurs under the ice (that last one is a joke)
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Dragonthunders
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From what I've seen, it seems that New Zealand is getting a subduction place on its eastward side, so it'll probably just go off on it's own. There's still a chance that it'll crash into some continent, but I think the chances may be a bit slim. In regards to Australia, there's a chance that it'll move northwestward at an increasing rate. Just to note, it's important to remember that continental plates are prone to cracking apart and joining together, so you can have a little more lee-way if you take enough time for your changes.

You know, I wondered a little about the path that would take New Zealand, as I initially thought that would be taken with australia in the same direction.

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