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I am a climate scientist and geologist and think that climate, geology, and geography are incredibly interesting fields that people deserve to know more about. If you have any questions that you’ve sat with for a while, are just curious, want to know more about future or past scenarios, or even have worldbuilding questions, feel free to ask!
You were mentioning elsewhere ITT how coal is an unusual or rare rock. I don't suppose halite is somewhat the same way? AFAIK it mostly forms from evaporating salt water, and would require a water cycle with a certain range of water coverage around a planet, and possibly tectonic activity.
And I would think that living cells might have a relation to it too, based on their need for a certain tonicity! Every geological cycle that living things play a part in is just so fascinating.