Questions tagged [geology]

For questions about rocks, minerals and the physical structure and substance of the world.

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4
votes
1answer
194 views

Turning the Mediterranean into a sort of NeoTethys

Today's Mediterranean Sea is just a shadow of its former self, the Tethys. In an alternate scenario, I have rearranged the African mainland to an angle that turns Gibraltar from a strait into an ...
3
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2answers
363 views

The REAL Tallest Peak on Earth

At 29,029 feet above sea level, Mount Everest has been credited as the tallest mountain on Earth. The only problem is that Mauna Kea, Hawaii's highest point, is 33,500 feet tall from its peak at 4,...
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4answers
1k views

Size of the volcano that ends the world

One of the theories behind the extinction of the dinosaurs is the eruption of one or a series of volcanoes. Supposedly the ash expelled by these eruptions blocked out the sun, killing plants and thus ...
5
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4answers
556 views

Earth's rotation stopped

Let's say through some magic or other, the Earth's spin came to a halt (to the point that the same side now always faces the Sun) How would this process feel? Obviously it would depend on how long it ...
11
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11answers
2k views

Reasons why returning to the surface is impossible [closed]

DISCLAIMER: This question is for a game, so any answers should assume that the person/people will attempt to go to the surface, even if they know it would result in certain death. If there was a human ...
18
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3answers
2k views

New York to Los Angeles using no fuel

In my very lengthy story in the near future, there are some great 'Modern Marvels'. The next one I'm going to introduce might not be feasible, but if it is, I'd like to attach some numbers to it. ...
10
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1answer
1k views

How far underground could a human civilization be before it is unsustainable/inhospitable?

For a civilization like this, firstly, I would like to know what dangers there are, e.g: radiation, cave-ins, temperature. I also want to know about the sustainability of this colony, power I'd ...
13
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4answers
2k views

A city of Sand…stone

Picture this...the sun sets over an orangish red desert, in the distance you see a town rising from three hills, a river snaking between them. The buildings rise from the hills and spread between ...
7
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2answers
729 views

How close is too close for a human habitation to be near an erupting volcano?

I am working on a survival suspense story, where a sizeable group of surivors is trapped in a tropical island (somewhere in the Ring of Fire) by a volcanic eruption. They find shelter from the ...
3
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2answers
451 views

Martian minerals

What minerals can we find in martian soil? Or what rare minerals can we find on our planet and can be placed beneath Mars? How deep, how much, and most important: how precious. I really appreciate ...
20
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10answers
4k views

How large can a volcano be?

A key part of the plot in a story I'm working on revolves around the main region being on top of volcano that is set to erupt. The trouble is that the region in question in my setting is roughly the ...
3
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1answer
216 views

Is there a mechanism to strongly heat up the Earth from the inside?

Sorry for any errors; I'm Italian. I'm working on a story where the Earth is devastated by a great geological cataclysm (strong earthquakes worldwide, volcanism bursting everywhere, large tsunami on ...
3
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4answers
328 views

Is it possible to alter plate tectonics?

Is there a way to split a tectonic plate into two plates? or a way to alter their motion? -What would the impact of a such a change up here on the surface? I know that plate tectonics is run by giant ...
32
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2answers
3k views

Gravity on a Minecraftian world?

I'm curious what the gravity would be like on an infinite area flat world. The plane of the world would have some finite depth but be infinite in all cardinal directions. This is, in effect, a ...
5
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4answers
428 views

All the rivers run west

I'd like to construct a planet where the rivers all run east to west, but I need a plausible reason for them to do so. Rivers run from high altitude to low, but also I suppose there is the coriolis ...
4
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2answers
309 views

Desert planet's atmosphere and cavern system?

Ok, so I have this planet that I am still building. It is a desert planet, its surfice is almost completely arid with a few exceptions such as snow deserts in the poles. There is sentient life in ...
5
votes
1answer
5k views

What percentage by mass of the earth's surface is water?

I am creating a fantasy world where a given race is mystically tied to the planet. Predominately this race will be earth-dwellers, quite happy and content to burrow underground, but I'd like some of ...
15
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6answers
3k views

What determines distribution of natural resources?

I am currently creating a world from scratch, and while I have a map, I still need to figure out distribution of natural resources. For resources like fossil fuels, while many do appear in deserts, I ...
3
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3answers
227 views

Huge sea level rise in a specific area [duplicate]

I have a continent and I want the sea level to rise temporarily, for several hundred years. The area that needs to be covered by water is about 3 million square kilometers. I was thinking about a ...
16
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4answers
844 views

Would it be possible to raise a piece of land from the ocean's floor?

Would it be possible to raise a piece of land (say the size of Texas or France) from the bottom of an ocean (say, the middle of the South Pacific)? More specifically, would it be possible (given the ...
15
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4answers
1k views

Shallow sea world - plausable geology?

Imagine a world covered in a shallow sea (usually only 4 metres or less) that has little land, where there is land its in the form of fairly small islands (less than 1sq KM) This will be populated ...
8
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1answer
955 views

How large can a mountain range get?

Start: Normal planet, very similar to Earth. The main difference is that the continents are placed differently. Magic could play a role in the formation of mountains but I prefer a scientific ...
7
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1answer
2k views

What do we get if we eat the moon?

Imagine we have a machine that can consume celestial bodies, breaking them down into component elements and storing them in big bins somewhere. If we fed that machine a moon, what would wind up in ...
10
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3answers
1k views

Is it possible to cool down a volcanic planet?

Here, I asked if it's possible to terraform a hot planet. But now, if we have a volcanic active planet, can we use the same techniques to cool it down? Normally, the planet cool off slowly after its ...
16
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6answers
3k 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....
8
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2answers
491 views

What is my bedrock?

I'm looking for a rock from which my island is constructed. It needs to be: Either created from the sea or via intense pressure/heat Capable of trapping layers of gas beneath it White(ish) I was ...
5
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6answers
628 views

What complications would arise from a world with an internal atmosphere and environment?

For a long, long, long time I have had a concept of a world that exists on the inside of a hallowed-out sphere. The basic construction of the world is like this: It is a large world, at the center ...
11
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4answers
3k views

If Yellowstone experienced another level 8 eruption on the VEI scale, what are the largest geographical implications?

I'm building a post-apocalyptic setting where the cataclysmic event is a volcanic eruption from Yellowstone that releases a blanket of ash that reaches from California to just before the Midwest. ...
12
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5answers
1k views

How could you dig a hole through the fluid mantle of a planet?

The Question of the Tunnel through a Planet grinds my mind. How could you dig a Hole through the fluid mantle of a planet? Would your walls not constantly break and collapse on you after the 15-20 ...
23
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4answers
827 views

Expanding occupied underground habitations safely?

I have a colony of humans living underground in man-made catacombs on another planet. They are, essentially, digging/blasting as they go; they did not create a complete underground city first and ...
52
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7answers
33k views

Creating a realistic world map - Landmass formation

This Query is part of the Worldbuilding Resources Article. This question focuses on the initial creation of landmasses. What are the processes that causes land-masses to form, and continents and ...

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