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Q&A

What is my bedrock?

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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 thinking about limestone but I'm not sure if islands with large quantities of limestone are realistic. Also could a softer rock such as limestone trap large quantities of natural gas (methane and hydrogen) beneath the surface?

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This post was sourced from https://worldbuilding.stackexchange.com/q/1287. It is licensed under CC BY-SA 3.0.

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