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Questions tagged [tectonics]

For questions about the tectonics of your fictional world, such as about how mountains are created or how plates would be affected by changes to the Earth's mass.

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3
votes
5answers
208 views

How to tackle one or multiple submerged continents

A part of the story I am writing involves two continents that centuries before the story takes place sunk into the sea. I want to have a way to explain this that does not come down to just the sea ...
4
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1answer
342 views

Can Someone Help Me Determine Plate Divisions?

I have a world designed called Ser. I want to place tectonic plates so that they can explain how the current landmasses formed. Below shows the 6 major continents of the world. As continents are ...
3
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1answer
131 views

How would a slip-strike fault develop in my terrain?

I am designing a fictitious continent, and as part of this I am also designing the prehistoric development of the continent up to the present day. A particular tricky part of this has been that, in ...
11
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6answers
4k views

Can a continent naturally split into two distant parts within a week?

If a great division occurs, sealing two warring cultures apart for many generations, my only explanation so far is a tectonic shift. I imagine water flooding between a long split. But as I understand ...
7
votes
1answer
131 views

How much surface water do I need for plate-tectonics on a planet?

I want to build a habitable desert gas-giant moon and I´m not sure how little water I can give it and still get plate-tectonics instead of an Io-like lid-tectonic setup. I want plate tectonics because ...
6
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1answer
172 views

What's wrong (if anything) with the tectonic plates on my fictional planet?

I'm trying to find someone (s) with enough geology knowledge to help me figure out some of the specifics of the world I'm building. (Earth-like in age, distance from star, size, tilt) I'm doing my ...
8
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3answers
190 views

Catastrophic geology

What would happen to an earth-like planet where an event caused a large (think, the size of the Caribbean tectonic plate) section of the crust to get peeled away, exposing the upper mantle for a ...
4
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2answers
232 views

How Would Plate Tectonics on an Inverted World Work?

Recently, I came across an inverted world map on the MapPorn Reddit made by MChainsaw. "Inverted" as in, the "continents" are now below sea level and the "ocean floors" are high and dry. (...
5
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2answers
195 views

Would a geologically ancient world be habitable?

Assuming an earth-like planet, but with several billion more years of cooling and settling (and with no moon to create tides). I'm imagining this planet would be geographically and tectonically ...
7
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6answers
844 views

A world without mountains

I'm relatively new to all this. I'm thinking of studying a little Earth sciences in the hope that it tells me but, up front, I want to know if I'm completely off. I want to know if a world with no ...
2
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0answers
83 views

Thousand Plate World: Effects [closed]

I have found this idea on a discussion on /r/worldbuilding. Anyway, the premise is as follows: The planet is earth-like in terms of size and mass. The planet has a very large amount of small, active, ...
5
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2answers
297 views

Thousand Plate World: Formation

I have found this idea on a discussion on /r/worldbuilding. Anyway, the premise is as follows: The planet is earth-like in terms of size and mass. The planet has a very large amount of small, active, ...
2
votes
1answer
62 views

What would the effects of rapid tectonic movement be?

So once again the world is in the Pangaea formation and the plates are moving on the same trajectory to form the continents that the world is in today (I'll refer to it as Modern). Instead of moving ...
5
votes
1answer
340 views

Where should I place mountains and deserts in this generated map?

Thanks for all the comments and I've re-edited the question: All nature settings(radius of planet, etc) are similar to the real world earth except the continent layout. I used Mogensen Planet ...
5
votes
2answers
257 views

Starting with a map of current landforms, how can I write the geographic history of my planet?

The current worldbuilding project I have is going to be detailed - very detailed. It's about the life of an alien planet called Nemo 4, and I want to chronicle the evolutionary history of that life, ...
27
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5answers
6k views

What would Earth's Land look like in the year 3000? would there be any significant changes at all in 1000 years?

I've tried researching this question myself, but the only data I can find is over huge timescales, like situations where the continents have reformed back into a Neo-Pangea. I'm not looking for any ...
5
votes
1answer
289 views

What are the best books on geology and plate tectonics for worldbuilders?

I am trying to achieve the best possible accuracy for new planets, for determining landmasses and continents and then gravity, axial tilts, day length, tides, seasons and so, without going too deep ...
4
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3answers
354 views

Is it possible for a tectonic plate to be separating from all the plates around it?

So here's the picture, an island about the size of Sicily is on its own tectonic plate, it borders three other tectonic plates, it's separating from all of them at the exact same time. This is a ...
9
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3answers
721 views

Is an offset mountain range plausible?

For my world, I would like a coastal mountain range that partway along its length is offset by a few (say, 100) kilometres, forming a pass through the mountains, like so: (N.B. I've drawn this very ...
1
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2answers
741 views

corrected projections: Is this world map realistic? I tried to use plate tectonics to inform my mountain and island chain placements

1 degree of latitude = 96.57 km. Equirectangular projections. (Yes, I need to revise the polar regions to make sure they don't get squished.) Obliquity of Jasmi: +31.1 degrees. Radius of Jasmi: 0....
7
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4answers
1k views

If all the iron and nickel in the inner core was transmuted into gold over two weeks

If some kind of insane wizard began a ritual that would turn the inner core of the earth into gold, what would happen? Over the course of 15 days, the entirety of the core will become gold. Each ...
68
votes
17answers
11k views

How could a natural road form across a sea?

BACKGROUND I'd like my earth-like world to have a naturally formed narrow strip of land that bridges a major sea. Now, before anyone rushes off to comment about island chains and land bridges, I'll ...
2
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3answers
1k views

Where should I place mountains in this world map? [closed]

So... I have this world map that displays only the seas and landmasses of an earthlike planet. Could you help me place the main mountain ranges where they would make sense according to plate tectonics?...
3
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2answers
143 views

If Earth's core gained and lost mass, what would eventually happen to the plates?

If the mass came from handwaving and just increased the core's density, what would happen to the plates? If, over the course of 200 years the planet fluctuated from +50% to -50% gravity, would the ...
14
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9answers
6k views

How could a planet have zero surface caves?

What could cause a planet to naturally have zero caverns with surface openings apart from small impact hollows in the sides of craters and crevices carved in cliffs? To be specific, zero large ...
2
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3answers
129 views

Geological Processes Without Internal Heat?

Suppose you have a planet large enough to support life, with water and air all that, but old enough that it has exhausted its internal heat supply, the core is frozen solid, and there is little to no ...
15
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5answers
2k views

Asteroid impact. How big does it have to be to globally affect plate tectonics?

I want to know about the plausibility and required parameters of the following scenario: Take an Earth-like planet, about the same size, composition and gravity. It has no plate tectonics to speak of....