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Based on the current state of thinking, somewhere in the vicinity of a couple hundred kilometers. This particular formation theory (Zhang & Lin 2020) is a variant of an idea that's been kicked...
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#1: Attribution notice removed
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System
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2020-06-01T14:14:00Z (over 4 years ago)
Source: https://worldbuilding.stackexchange.com/a/174328 License name: CC BY-SA 4.0 License URL: https://creativecommons.org/licenses/by-sa/4.0/