Questions tagged [geology]

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

Filter by
Sorted by
Tagged with
3
votes
3answers
53 views

Easiest to acquire solid element with high purity?

The goal is to create the Great Wall of China out of Titanium - which is to say you need a lot of material. Transmutation magic exists which can turn anything into a pure element (Titanium in this ...
11
votes
1answer
156 views

How deep can the oceans be while still alowing some land?

Many alien worlds will most likely be water worlds. I was wondering what the deepest possible global ocean dept is where land is still possible. I think that volcanic islands will still have a chance ...
4
votes
1answer
231 views

Mountain Destruction by mining

I have a mountain in a story that basically needs to be taken down (inadvertently) by human action in a world with premodern (so mediëval/ early renaissance at best) tech levels. I have been thinking ...
1
vote
3answers
83 views

(Semi) Believable way to quickly submerge a large landmass

I once before asked a question on how to quickly submerge a large landmass/continent. The answers there basically concluded that literally ''Sinking'' (a la Atlantis) is pretty much impossible to do ...
19
votes
4answers
5k views

Could terrain like this form on Earth? If so, how?

I am creating an RPG and came across an image that I wanted to base my landscape on. It is shown above. Is it possible for terrain like that to form on Earth (ignore the wildlife)? If it is, how could ...
2
votes
3answers
117 views

Could an island on Earth with these climate types exist?

I am creating an RPG and I created a continent in which it is set on. I want to make sure that the climate types in it are realistic as well as the continent. This island is called Lartess. Lartess ...
0
votes
1answer
59 views

Plate tectonics required to create a area where the land “grows” very rapidly, very often?

From what I understand, Mount Everest grows about 2.4 inches per year. I am trying to create an area of land that grows very often, often around 1 inch per day. As I'm not very good with plate ...
7
votes
2answers
155 views

Is it possible for a planet to have an area saturated with lava but at the same time is still habitable to humans and other lifeforms?

An area of my planet is very saturated with lava. Being quite similar to the Siberian Lava Traps, it is essentially a lava sea. This lava “sea” area isn’t necessarily all lava however, as there are ...
3
votes
3answers
81 views

What aquatic life would utterly deplete the soil of a specific nutrient?

In my story an area was formerly beneath an ocean or lake. Some form of life leeched the soil of a specific mineral or substance. Technology level is that of ~1700 Spain. Now that the water has ...
7
votes
1answer
98 views

Temple fell down sinkhole in mining area, toxic gases

My temple was built near a kaolin surface mine, which is itself topping an old deep mine (where they used to mine radioactive metals, rare earths and possibly other miscellaneous, if need be). This ...
3
votes
3answers
103 views

Would these processes be probable on this planet?

Background This planet, located somewhere in the Andromeda galaxy, orbits a M5V star about 0.682764 AU away from its star. The planet is volcanically active due to the gravitational field of the ...
3
votes
1answer
101 views

Consequences of hitting a Pluto-like planet with a highly luminiferous meteorite?

While the intended end state is that this planet can support space-faring lifeforms, the solution under question needs a sanity check. I cannot commit to many numbers with how speculative this all is ...
5
votes
1answer
105 views

How Would a Continental Landmass Sink?

Atlantis is real. It's just that there's more than one of them, and none of them are actually called "Atlantis". Instead, they consist from the Kerguelen Plateau in the Indian Ocean to Zealandia, a ...
3
votes
1answer
75 views

UHT Ceramic Geology

Earth rocks are largely silicates, combinations of silicon, oxygen, and various other trace elements. What would a planets geography look like if the crust was primarily composed of ceramics like ...
4
votes
1answer
97 views

Could Volcanism Provide a Large “Heat Oasis” in a Polar Desert?

So there is an Antarctic like continent in my setting; and just like Antarctica it is the largest and most inhospitable desert in the planet due to how absolutely cold it is. But what if there was a ...
3
votes
1answer
132 views

Could a Greater Relative Abundance of Tin Extend a Bronze Age?

Bronze is an alloy of copper and tin, and copper is a significantly more abundant metal in the Earth’s Crust, at about 70 PPM compared to tin at 2 PPM. Because tin was the limiting factor in bronze ...
2
votes
2answers
107 views

What geologic processes would create an unstable cliff on which a city is built?

I have a city which will be completely submerged in water due to a catastrophic earthquake. It is placed on a cliff side, so that it will drop directly into the ocean. Technology is similar to the ...
4
votes
1answer
129 views

How feasible is a mobile city that sails across a salt flat?

Imagine a huge salt flat like Bonneville or Salar de Uyuni. Due to other logistical concerns, commerce between the economic powers on either side of the flat is forced travel across it. This has ...
3
votes
6answers
183 views

What Else Could Reduce Global Sea Levels?

Anyone who has studied ice ages would know that during the last two-and-a-half million years of Earth's history, there have been periods where there was enough ice to suck up a lot of water. As a ...
12
votes
3answers
315 views

What would the geologic record look like on a planet in the galactic halo?

Imagine an Earth-like planet orbiting a Sun-like star in the inner halo of the Milky Way. As a halo star, it will likely be somewhat metal-poor, having formed early in the life of the galaxy, but ...
2
votes
1answer
96 views

Is an extinct volcanic tube marketplace possible

Could people with Iron Age technology possibly dig large holes in volcanic rock on the edges of a lave tube system. Would this be an effective way to run a trade business or to live in an underground ...
5
votes
1answer
132 views

Factors that determine the geology of a planet (what factors determine the elemental composition of the planet)

This is my first world and I want to build in a way that is physically possible (if this is possible, otherwise make the necessary changes) for my civilization (which is mostly fleshed out) but I don'...
13
votes
1answer
340 views

Where do hydrothermal vents form inside icy ocean worlds?

Context: In a near-future version of our solar system, humans have established multiple underwater colonies on Jupiter's moon Europa. Many of these outposts are situated next to hydrothermal vents ...
1
vote
2answers
153 views

“Fantastical” Geology in Sci-Fi? [closed]

For a story of mine, I wanted to include the kind of "unnatural" - at least for Earth - geology that you sometimes see in sci-fi. Meaning in this case massive stone spires or land bridges spanning the ...
5
votes
1answer
148 views

Rock layers in Procedural Map Creation

I've been working on a procedural map generator for a strategy game (if I ever get to gameplay). My general development philosophy is "believable but not necessarily realistic", in other words I don't ...
4
votes
2answers
108 views

How to Renew Old Mountain Ranges

Conventionally, there are two ways to build mountains--direct collision (as is the case with the Himalayas) and one side sinking beneath the other (which explains why the Pacific Ring of Fire is ...
3
votes
1answer
81 views

Possible for a large enough structure to survive plate tectonics?

Is it possible for a large enough structure built near a small enough subduction zone to become lodged in it or buried very slowly as opposed to taken underground? If so, how big would the structure ...
7
votes
3answers
198 views

If you melted Europa's ice would there be any land?

First question: if you melted Europa's ice, would there be any land? Second question (assuming the answer to the first question is no), how much water would you have to remove after that in order to ...
14
votes
4answers
4k views

Where should I place my fictional continent in the South Pacific?

Rather than creating an entire world for my worldbuilding project, I was planning on adding an additional continent to Earth. Since the largest “empty spot” is in the South Pacific and one of my goals ...
5
votes
3answers
109 views

How do i worldbuild planetary regolith

The planet needs to be able to support life but initially ve devoid of it. Which I would think would make it's Soil like that of a desert. The regolith may be important for early agriculture. It can ...
3
votes
1answer
61 views

plausibility of this double planet system? [duplicate]

So, I'm about to start a new worldbuilding project for a fantasy world, but I want to try to make the basic world at least somewhat plausible; the magic in the setting is going to be pretty low-key, ...
18
votes
6answers
3k views

Permanent river of lava

Rivers of lava are a staple of fantasy. But in the real world, lava flows are usually very short-lived phenomenons caused by volcanic eruptions. Is there some plausible way on an otherwise earth-like ...
3
votes
4answers
486 views

Are two Pangeas possible?

As we know, the Earth had one super continent at one point in the history of our planet, which eventually broke apart to become what we have today. Assuming we're talking about a planet near ...
9
votes
4answers
307 views

If we dug a really big hole on Mars, how long would it last?

How long will a 400 km wide 30 km deep pit (trench or crater) with a relatively shallow (for stability) gradient of slope of 20 degrees from the edge to the surface of the planets crust be expected to ...
2
votes
7answers
2k views

what kind of natural disaster can affect earth on a planetary scale?

Our world is surrounded by a metaphysical barrier that separates us from other dimensions and the things which inhabit them. This barrier is made up of 7 layers, with the last one being the closest to ...
0
votes
1answer
98 views

How would a submerged continent quickly rising to the surface affect the geography of its surrounding lamdmass? [closed]

Long ao, a philosopher wrote about a city called atlantis. This nation was a dominant force in the world until it lost a war with Athens, sinking into the sea. However, the simple minded buffoon got ...
2
votes
3answers
193 views

Could a carbon based lifeform use the mineral olivine in its structure? Why would it?

Have a creature from a dream. It's a carbon based humanoid creature partly made of the mineral olivine. Could there be any reason it might contain this mineral? Perhaps a show of health - the more ...
9
votes
7answers
1k views

How big could a meteor crater be without causing significant secondary effects?

I need to wipe out a city. Not a huge one (I won't let them grow beyond a certain limit), but big enough to need to do some pretty serious damage. Let's say something similar in size to Pompeii. (yes.....
4
votes
3answers
138 views

How Would Organic Material Erode If Petrified

So in my world, the main Antagonist has the ability to drain the life from things around her, turning them to stone in the process. That made me wonder how organic material would erode if it were ...
6
votes
4answers
567 views

How could a volcanic island last for 100 million years?

Some islands can survive for very long. Madagascar, for example, has been around for 80-100 million years and is likely to remain isolated for hundreds of millions of years more. Volcanic islands, ...
8
votes
2answers
649 views

What's the largest igneous province an impact event could create on Earth?

With the potential for an impact event to trigger volcanic activity on the opposite side of the planet, what is the largest plateau of flood basalt physically capable of forming on Earth, post-impact?
4
votes
9answers
1k views

What evidence would there be if radioactive decay changed 7,000 years ago?

I know we generally operate - or religiously operate - on the principle that fundamental things don't change over time. It's the bedrock of geology - Uniformitarianism. I also believe it is unprovable ...
7
votes
2answers
726 views

Can a planet's magnetic field be generated by non-ferromagnetic metals?

I am trying to construct a terrestrial planet that is almost entirely made of silicates but with a core that's able to generate a magnetic field. I really don't want to use iron, nickel, or cobalt, ...
2
votes
1answer
48 views

Is it possible for an impact event to render the Earth's surface unrecognizable while still forming a large complex crater?

Is it physically possible for a complex crater to form and remain stable after an impact event large enough to deform the Earth's crust globally, insofar that the surface of the planet becomes ...
3
votes
7answers
254 views

How to trap medieval humans in a land using geology?

These humans must never see the ocean and should still be able to survive. They can only get out of the land if they improve the technology level. Is it even possible? The lakes or seas should ...
3
votes
5answers
250 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 ...
3
votes
1answer
105 views

How to form a huge natural plateau with a slope?

I need a huge natural plateau to form but with a slope. There can be some variation, a few hills or even mountains here and there, but the ground needs to be mostly gently sloping north to south. It ...
2
votes
3answers
203 views

What Animals Could Live in a Glass Ocean?

So I had this idea of a world with an ocean sized pool of super hard glass that formed millions of years ago on this planet. I started to think of the implications of something like that: In some ...
3
votes
3answers
213 views

Does or could a collection of regions like this exist on Earth?

I initially assumed my world was going to be pure fantasy, but the more I think about it, the more I consider having the story take place somewhere on Earth, either as alternate history or the far ...
8
votes
2answers
85 views

Plausibility check: heat emission from extinct volcanoes

There's an important aspect of my headworld involving volcanoes which I planned many years ago. Recently I revisited this concept to refine it further, only to run into a few questions that I've been ...

1
2 3 4 5
9