For more, plus stunning images, also see The mega-flood that made Britain an island
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Ping!
It should be noted that for years, they thought the Scab-lands in the US were formed in a single flood.
Turns out there were dozens, maybe hundreds or more floods over the years.
Mega-Floods are a common pattern of very large glacial environments. We’re learning that glacial environments are nasty, unstable places, not just pretty snow and polar bears.
So if the first major event was Noah’s little weather disaster 4500 years ago then when did the second major event occur? Actual scientists are saying it happened 20,000 years ago. That kind of falls outside of your timeline, doesn’t it?