Questions tagged [geology]

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

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2
votes
1answer
35 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
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1answer
75 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
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3answers
176 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
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3answers
162 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
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2answers
70 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 ...
6
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4answers
2k views

How big would the ice ball have to be to deliver all the water at once?

One popular theory to explain how Earth got its water is that it was delivered by asteroid/comet/etc. The form this theory usually takes is that many small impacts occured over a long time, each ...
4
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6answers
150 views

Giant, Periodic Geysers?

My world has giant geysers. The height of these geysers oscillates over a cycle of 3 or so days. Things you need to know: 1. There is an unknown force in the core of the planet, which exerts ...
3
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3answers
147 views

Would an exoplanet highly rich in Iron (and other metallic properties) have any effects on technology?

Im working on a story about a new exoplanet discovery and its subsequent "Near Future" colonization. The planet is close to its parent star. As such, I have decided to give it a sizeable molten iron ...
8
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3answers
232 views

How Can I Explain a Giant Equatorial Gash?

I have a moon in my story that has a thin, deep gash or canyon that lies on its equator and spans the entire moon. My original idea involved the sudden orbital decay of a ring system, caused by a ...
24
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5answers
3k views

How To Make Earth's Oceans as Brackish as Lyr's

Allow me to present Lyr, one of a handful of worlds crafted by artist Chris Wayan: The one detail among a vast many that is important to this question is that its salinity is about 1.5%, roughly half ...
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0answers
98 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 ...
7
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2answers
133 views

What geological processes could form the Crystal Desert on the planet Thra in the Dark Crystal?

The Crystal Desert is a Sahara-like expanse of sand, dotted with numerous large clusters of crystal, and containing numerous monolithic sandstones. What would we expect Thra geologists to determine ...
6
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2answers
126 views

Longest “linear” natural formations

In an effort to gain inspiration for planetary formation and, at the same time, inspiration for governmental/territorial boundaries between residents of said formed planets, I've recently encountered ...
3
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3answers
117 views

what would be needed for a sword that glows? [duplicate]

how would it be possible for a sword that glows a very dim light at all times. What materials would be needed to do this? would this hamper the effectiveness of the blade?
6
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4answers
136 views

Identifying minerals without sight

Properly ventilating a deep mine is a significant engineering challenge. Ergo, you don't want to be carrying around torches that use up some of your precious breathing oxygen if you don't absolutely ...
14
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4answers
395 views

How deep could dwarves actually delve?

Given an arbitrarily long time to do so, what is the maximum depth too which a dwarven civilization could practically extend their mines / cities? And what would be the final limiting factor ...
5
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2answers
159 views

Appropriate Material for a Red Moon

I have some ideas regarding this, but thought I would check to see what you guys can come up with, as I found some of the ideas here often trump mine in originality and/or plausibility. So, I have a ...
9
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4answers
199 views

Moving mountains

In our world, mountains generally only move up (while forming) or down (while eroding or sinking). Otherwise they follow the tectonic plates they happen to be on. In island chains like the Hawaiian ...
3
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3answers
169 views

Plausibility of (large) continents on a world with hundreds of tectonic plates

Suppose an earth-like world with roughly 500 major tectonic plates. Question What is the plausibility of such a world to sustain (large) continents? Why? Further clarifications: speed of plates: ...
5
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4answers
209 views

Connecting Biomes

I'm in some urgent need of advice about linking together biomes in a realistic manner. Can a taiga connect to an alpine tundra to the north, and a steppe to the south? Then what would branch off of ...
3
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3answers
107 views

What would be the chemical composition of the crust and core of a planet comprised primarily of diamond?

I’m creating a world for a webcomic and I’m running into some difficulties – namely, my own limitations. I’m not a scientist, and I don’t even know how to start asking the questions I want answered. ...
7
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1answer
124 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
165 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 ...
6
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2answers
200 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
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3answers
188 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
193 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 ...
14
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2answers
491 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
814 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
172 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
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4answers
824 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
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2answers
226 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
162 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
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2answers
385 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
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4answers
357 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
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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
292 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
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2answers
144 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
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3answers
211 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
173 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
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3answers
186 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
208 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 ...
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3answers
125 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
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5answers
117 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
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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
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3answers
239 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
953 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 ...