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Questions tagged [geology]

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

6
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2answers
137 views

If Earth's Oceans Were as Deep as Europa's

Earth's deepest point, the Challenger Deep, is almost seven miles below sea level. By contrast, Europa is smaller than even Earth's moon, yet its oceans are anywhere between 40-100 miles deep! So the ...
8
votes
3answers
168 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 ...
7
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5answers
186 views

Is it possible to have naturally occurring deposits of diamond on a volcanic island chain?

The People of The Shining Isles have long been exploited. They are cruelly used in mines, excavating tonne after tonne of rock and dirt in pursuit of what the Warriors from Away call ‘diamonds’. These ...
13
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2answers
468 views

Where do I put diamond mines on my map?

I've got a home-brewed D&D setting. Diamonds, in D&D, are needed for resurrection magic, so access to diamonds is literally life and death for any country with clerics capable of casting such ...
14
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1answer
795 views

Geological aftereffects of an asteroid impact on a large mountain range?

For the sake of analogy, let's take the Chixclub impactor and move it a mountain range akin to the modern Himalayas. Obviously we're dealing with an extinction level event here so I'm not concerned ...
4
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4answers
142 views

Is it possible to create a realistic habitable planet/moon with actually alien landscape? [closed]

There is a standard challenge while creating landscape for habitable planet, as it should be both: physically realistic (so presumably like Earth) alien (so presumably not like Earth) Standard, ...
9
votes
4answers
779 views

Is a reptile with diamond scales possible?

I thought of a concept for a dragon or similarly gigantic reptile with a special adaptation, in which they’re born with scales made almost entirely of carbon. Then, over an incredibly long life cycle, ...
4
votes
2answers
207 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. (...
3
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2answers
145 views

Would an deep sea lava river be feasible?

I don't wanna reveal too much about my world, however, the basic idea is that there is a town of people who live deep underwater (they are biologically capable of doing underwater gas exchange and ...
3
votes
2answers
377 views

Would It Be Feasible to Hollow Mount Everest Into a Palace?

Let's say that some Oriental emperor had decreed that he should move his palatial residence from China to Everest. Specifically, he wanted Mount Everest to be his palace, which means hollowing the ...
13
votes
4answers
345 views

Can a liquid sand ocean exist naturally?

I'm talking about this sort of liquid sand: https://www.youtube.com/watch?v=My4RA5I0FKs "Desert-as-sea-analog" is present in many media, but often they lean heavily into fantasy, and it seems not ...
6
votes
1answer
1k views

Can rocky hills similar to the Scottish highlands be located next to a bog?

I've written about these rocky hills with short grass, gravel, shrubs, and big boulders. At the bottom of one of the hills is a big bog. Basically I've designed some buildings to be sticking out of ...
20
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2answers
4k views

A hang glider, sudden unexpected lift to 25,000 feet altitude, what could do this?

This is the third in a series of 5 (at this point) questions. It's not relevant to this question, but for anyone who's curious this was the first, this the second. Conditions for this question are: ...
8
votes
3answers
233 views

Giant rock spikes sticking out of the ground

Would it be possible for huge, hundreds-of-metres-long spikes of rock, ideally slanting at an angle, to arise under natural processes? For clarity, I mean like this: Copyright Joe Jesus There are ...
8
votes
2answers
128 views

What geological and chemical changes to the earth's makeup could effectively limit technological advancement

Basically, I want to freeze the technology of earth at a level reminiscent of pre-Industrial Revolution Europe. I'm trying to figure out what substance or material would have to be absent from the ...
8
votes
3answers
196 views

How to calculate the thickness of the ice-layer of a frozen ocean planet/moon?

How do I calculate the thickness of the upper ice layer on cold ocean worlds like Europa, Enceladus, Ganymede, ...? I'm asking this for a programm I'm currently writing. Given/Known is: mass, radius, ...
2
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2answers
111 views

Realistic placements of Mountains and the like

This question basically boils down to this: What would be the places on a given continent where one would find mountains? I have seen maps from games, movies, board games, books etc. where it would ...
3
votes
3answers
180 views

Geological Explanation for an Unusually Temperate Northern Mountain Valley

So I'm working on a home-brew D&D setting and I have this idea for the my campaign to take place in a large isolated Valley completely surrounded by mountains. I also had the idea to have these ...
9
votes
1answer
189 views

To make a blue moon, what element does it need?

We know that Mars has a reddish color, because its ground consists of iron-based compounds. The moon is grey-whiteish because it consists mostly of silicon-based compounds. What element should the ...
1
vote
3answers
118 views

What Else Could Create Jeffrey Linn's Coastlines BESIDES The Influence of Ice? [closed]

Who? Unfortunately, I could not find any background information about Jeffrey Linn, but he is better known for his sea level maps. Specifically, what a particular city would look like if sea levels ...
15
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8answers
4k views

How to explain one side of Super Earth is smoother than the other side?

A spaceship flew across an unclassified region of the Milky Way galaxy and found a Super Earth in an unnamed system. The planet is almost twice as massive as Earth and is orbiting fairly far away ...
0
votes
5answers
113 views

How Can the Coastlines Look Similar In Spite of the Cooler Temperature

The established fact is that the shape of a planet's continental coastlines is determined by the planet's climate. Higher temperatures mean less ice, which ultimately means higher sea levels. (Case ...
7
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2answers
2k views

What could make a ship made of pumice seaworthy?

I'm designing the type of ships an amphibious race could use for long distance travel, like a floating house, following oceanic currents. I imagine it shaped like an iceberg, with more structure below ...
29
votes
14answers
6k views

How can I launch a projectile to hit something in orbit, using only geological structures and power sources?

As an ancient organism whom currently occupies a large chunk of a planet beneath the surface, I have a pesky issue with an invasive species. These humans have decided to colonize my home, mistaking it ...
5
votes
3answers
228 views

What kinds of minerals or compounds could radiate heat?

I'm working on an RPG in a world with some magical elements, like a type of energy (so far unnamed) inherent in animals and humans. Those with high amounts of this life energy in them are thought of ...
2
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3answers
913 views

Real “Alchemical Transmutation” of Some Other Mineral Into Gold? [closed]

While obviously you can't really transmute something like Lead into Gold (as far as I know), is there any real-life mineral or element that could be used to artificially create Gold from whatever its ...
9
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4answers
3k views

Desert planet with forests at the poles

I'm thinking up a Mars or Venus type planet where the poles (or one pole) has a forest growing out of it due to a device that is used to make the planet more habitable by creating a oxygen friendly ...
3
votes
1answer
105 views

How can I turn diamond into graphene?

The goverment of Africa decided that it would no longer tolerate the diamond mafia, so the corporation of DeBeers was hunted down and disbanded, to put it lightly. Now, all the diamond mines have been ...
3
votes
2answers
131 views

Human caused disasters creating a whole new continent

So my world needs to be destroyed because of a variety of things. New land masses would be created and destroyed and joined till we had a single continent. In the future, people saw the possibility ...
2
votes
2answers
149 views

What would happen to the Earth if it were suddenly transported to a completely empty void? [duplicate]

The entire planet Earth is suddenly teleported (never mind how for now) to a completely empty space. No sun, no moon, no stars or other planets. There's absolutely nothing out there and it appears ...
3
votes
4answers
147 views

Underground Atmosphere

I have a terrestrial planet that is similar to Mars in many ways, a desert-like surface, thin atmosphere, and inhospitable to large flora and fauna as we know it. This planet has ceased tectonic ...
-1
votes
1answer
52 views

Water flow in faults [closed]

Can water flow from a point 1200 meters above sea level, through fissures or faults below sea level for a distance of 8 km and follow the fault upwards to a point 300 meters above sea level?
5
votes
1answer
214 views

How to make a bigger planet be as similar to Earth as possible

My fantasy world is slightly larger than earth so that discovery of the continents becomes harder (about 20% surface should do it). But at the same time I want to preserve most aspects to make it like ...
13
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13answers
4k views

What conditions would make having them sunken into the ground the predominant way of building large structures?

As he neared the outskirts of the city the canyons of multi-storey buildings lined with coffee- and tea-houses gave way to the large squat shapes of factories, storage-halls and other industry. If it ...
23
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10answers
3k views

Realistic geological and chemical composition of an edible planetary surface

We all at some point in our childhoods thought that the moon is made out of cheese. As such, I thought: under what circumstances can a planetary surface form in such a manner that it is edible (and ...
7
votes
6answers
794 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 ...
4
votes
5answers
319 views

Civilization on a diamond exoplanet?

If humans discovered a diamond exoplanet and then traveled there, how would they set up civilization on a diamond exoplanet? Everything needs a foundation, even on low-gravity planets (below 9.8m/s^2)...
2
votes
0answers
78 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
votes
2answers
288 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, ...
3
votes
2answers
94 views

Survival of Eukaryotic Life in Stagnant Oceans

I was trying to figure out the early geological/biological history of the world I'm creating, and I was wondering about the development of early life. Basically, I've envisioned a world where ...
9
votes
4answers
1k views

How long does it take for islands to form after an underwater volcanic eruption?

So, vaguely, I remember from earth science that when submarine volcanoes erupt they eventually form archipelagos. My question actually has several parts; Starting with the first eruption to break ...
13
votes
1answer
243 views

Planet-wide vocalizations: is there a natural limit preventing it?

Premise I recently recalled when the Chelyabinsk meteor crashed overhead in 2013. The pressure wave was immense. The infrasounds, as recorded by nuclear missile detectors, appeared to traverse the ...
9
votes
6answers
369 views

Long Term Zircon Data Storage

Question How can Zircon be used to record data for generations of life forms? Requirements Must be able to store the data with little to no loss of it, for a least 541 million years The data in the ...
3
votes
1answer
113 views

How do I figure out the size of an Earth-like world's layers and composition of elements

After getting help from the members of this site with Worldbuilding an Earth-like world around an F-Type Star, I have another question. The Planet's radius is 90% of Earth's. The Planet's rotation is ...
7
votes
2answers
237 views

What geological consequences would result from a binary planet system?

Before picking specs, I need to ensure feasibility. Only one of the planets need be Earth-like; in fact, I would prefer if the other planet were rather small and dead, like a moon. The orbits will be ...
3
votes
3answers
169 views

Can A Theia-Like Object Make Earth Richer?

Let's start with a little backstory--our planet underwent an impact-coalescence cycle only once, 4.5 billion years ago, when a Mars-sized object named Theia destroyed the infant Earth in a glancing ...
4
votes
2answers
135 views

All the Radioactive Metals Inside Earth's Core--How Would They Affect Convection?

In relation to a recent question of mine, this alternate Earth still has its core consisting of 84% iron, but the other 16% contains the greatest concentrations of all known species of heavy metals (...
6
votes
1answer
2k views

If Earth's Core had ALL Of the Heavy Metals

Back home, Earth had gone through an impact-coalesce cycle only once. Since then, its core has been 84% iron, 6% nickel and the rest being labeled by The Encyclopedia of Earth: A Complete Visual ...
21
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12answers
3k views

Malign Science: Counter argument for KT boundary

Premise This is a world in which humans are blissfully unaware of their own vulnerability. Needless to say, there are many vulnerabilities to address, however, this question deals only with the ...
15
votes
2answers
239 views

A blue flamestorm blasting through a system of big yellow caves?

What I "want": My fantasy world has lots of volcanos. Deep under the surface there is a root-like form of life predominant. It grows in big bundles and searches for important minerals, gases, fluids, ...