alt Hacker NewsThe sea level rose more than 120 meters in the last 20000 years, so it won't necessarily be that short distance, but I think at least it should be easy to calculate where to look.
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neuronic • today at 10:12 AM
Yes, even more recently the entire space between England and continental Europe used to be connected landmass, Doggerland [1]. It was home to Mesolithic people just 8,200 years ago.
[1] https://education.nationalgeographic.org/resource/doggerland...
An area with a half % slope could have an entire city below the waterline.
I think we're going to find that much like central and parts of South America, the extent of civilization has been vastly underestimated because Nature has covered over it.