New answers tagged

1

It would look pretty much like a clipper on steroids. To overcome drag and develop reasonable speed, an amount of surface area on the sails was needed similar if not larger than the size of the ship itself. This is in water which develops much less friction than land. To keep up speed and overcome friction an approximation of probably three times the sails ...


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Signatures aren't your problem, Uranium is Most dating is done with Uranium and if you can't get absolute ages on surrounding rocks you might be able to figure out this pattern exists but you need corresponding strata to have minerals like zircons (mostly found in volcanic ash) with uranium imperfections to get an accurate age. They could easily isolate the ...


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Some form of life has sequestered it away Pick an area where a large amount of rainwater falls and will ultimately flow back into the sea. Some form of life in that area evolves that uses the component elements of water to create biological structures. This could be the shell of a crustacean or the bark of a tree for example. What matters is that all the ...


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The effect you're looking for is plate tectonics. Basically if you can't change how much water is in the container, make the container larger. Tectonics and glaciation are the 2 big effects we've seen historically, tectonics explains the Cretaceous sea levels. Here's some tectonics that change sea level globally: Open up an inland low area (that could ...


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Space dust deposition might be different in the disk. Cosmic dust of extraterrestrial origin rains down on the earth all of the time - thousands of tons of it. In your scenario, as the planet passed through the disk, one would expect a change in the quantity and composition of dust accumulating. The dust might be comprised in part of dense elements unusual ...


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A sizeable meteor falls on the ocean. A lot of water gets ejected into space. This one has plenty of side effects, but I'm pretty sure the sea will eventually stabilize at a lower level.


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Since the purely physical ways of removing water from the cycle have been covered, i'll try a different approach. Assume that a creature evolves (let's say it's a plant) that use water to create more complex molecules (as every plant does), but it creates solid matter, that won't be consumed by other creatures. that way, the plants will actually consume the ...


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In supplement to L. Dutch's excellent answer, there are at least two other ways sea levels could reduce dramatically, albeit on quite a long time scale: Cooling Earth's interior The seas on our planet are mainly held up by pressure from below. Water that seeps down through the crust is heated until it reaches boiling and creates steam pressure that ...


5

If you want to reduce the sea level, you have to trap that water somewhere. What are the options? Ice caps: this is the famous ice age Evaporate it: would turn Earth into a Venus-like planet due to the greenhouse effect of water vapor Large inland basins disconnected from the sea: water going there can only evaporate to reenter the water cycle.


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Assuming an Earthlike planet orbiting a halo star and passing through the galactic disk, let's look at the case for geological evidence of supernovae. Because the planet is Earthlike we can assume the geological evidence will be effectively the same for the Earth. If its passage through the galactic disk takes it close to more supernovae than the Earth has ...


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Yes and No Yes you could but a marketplace needs to be near people or on a trade route. You need some kind of reason why building it in a lava tube is a good idea and not just a bunch of buildings like elsewhere. If the market was on top and the lava tube was the cellar from hell, I could see why. That said, a lava tube is just another cave and lots of ...


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Hot springs in Pamukkale are known to exist since antiquity, likely even longer. Geothermal plant of any kind built on them is not likely to deplete them, unless it several times increases the amount of extracted hot water.


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Put them near the cracks Tidal effects will happen to the rocky crust as well as the ice sheets above. We thus assume where we see venting and cracks on the icy cap, similar activity is happening directly below it. Given this as the fundamental question: I want to place colonies next to vents as I make the world map, but I don't what pattern to place the ...


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Rather than copying the list of resources to here, I suggest that interested parties browse the answer to this previous question (A list of worldbuilding-resources?) where an humongous long list of resources is to be found. You could do worse than start with this intro youtube vid to the solar system's geology. Here's another touching on some big moons of ...


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