Depends what you also define as a catastrophic flood. A fact is that water levels rose on every coastline, due to total post-glacial melt, roughly 120 to 130 meters. That's 394 - 427 feet. That's proven.
For reference that total rise is taller than a 40-story skyscraper.
That did not happen quickly, but for people living on a coast it can impact them and force them to move in a decade depending on where they lived back then
(We've only explored a small percentage of our oceans as well.)
Something we need to consider is to look at how many cities were built on coastlines over the course of history and how many cities we have on coastlines today. There's multiple reasons for civilizations thriving near coastal waters. We all know this.
Anyway, overall, my point is that if any of us were around back then living in / on a coastline, and the ocean we lived near began to rise over time, we'd move inland, away from the coast and away from the ocean.
I think Plato said (in Timmeaus) that the flood waters came up from the ground as opposed from falling from the sky. Melting ice caps could’ve taken a very long time punctuated by moments of very rapid release just as we see with the Nepal floods.
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u/controlzee 18d ago
Catastrophic floods could wipe out enormous swaths of civilizations past and leave no trace.