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They’re too busy denying the Genesis catastrophe to figure out any of these simple and obvious things.
It was 4500 years ago, not 75 million or billion or any of their fantasies.
Pangaea was broken up by volcanic eruptions, and hot water surged up through the cracks killing everything in the Earth.
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There is simply no evidence for that and a great deal of evidence for an ancient earth. However, the conflicting ideas will never be reconciled because your beliefs are faith based.