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How quickly can a continent split and separate without an Extinction Level Event occuring

An Industrial Revolution and Melting Ice Bridge Instead of trying to displace all that rock, imagine a case where two continents are connected by an ice bridge. This was once the case for North ...
Nosajimiki's user avatar
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3 votes

How quickly can a continent split and separate without an Extinction Level Event occuring

Yes. I can see one way. Assume an underground sea. 100 mile wide underground cavern filled with sea water. And then the ceiling collapses. Maybe a meteor punctures the roof. Maybe it just finally ...
SRM's user avatar
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1 vote

How quickly can a continent split and separate without an Extinction Level Event occuring

Rather than the edges of the continents moving apart from each other, instead picture the area of the Mediterranean Sea as not being connected to the Atlantic, and rather than being completely filled ...
Michael Richardson's user avatar
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How quickly can a continent split and separate without an Extinction Level Event occuring

About the only thing I can think of is that your continent stretches across 2 tectonic plates that are moving slowly apart. This already has created a huge rift-valley (similar to the Great Rift ...
Tonny's user avatar
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2 votes

How quickly can a continent split and separate without an Extinction Level Event occuring

You aren't going to even come remotely close in any time we'd consider human history. Even trying to do this in ten thousand years would be an ELE. If you're talking about several hundred miles over a ...
Robert Rapplean's user avatar
5 votes

How quickly can a continent split and separate without an Extinction Level Event occuring

Somewhere in the range of a hundred thousand years Your numbers don't add up. For normal plate tectonics, the fastest recorded speed is 8.5cm/year. For a hundred mile gap, that would take 1.8 ...
jdunlop's user avatar
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4 votes
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5km Portal above a Hot and Cold Climates, What happens to the weather of the area?

Cold air would pour through If air pressure were equal, and everything were perfectly still, then not much. In a normal environment you get perterbations and vortices that will make some of the cold ...
Robert Rapplean's user avatar
1 vote

5km Portal above a Hot and Cold Climates, What happens to the weather of the area?

Not Much You've stated that from above the portals are invisible so they are both facing down towards Earth. Cold air falls and hot air rises, but because of the way they are facing the hot air will ...
HSharp's user avatar
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5 votes

5km Portal above a Hot and Cold Climates, What happens to the weather of the area?

I'm not an expert, but I do not believe there would be significant exchange through the portals. While warmer air might rise through the portal, the cold zone will be higher pressure and so probably ...
MarsMagnus's user avatar

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