Noah’s flood was about 20,000 years ago.
Noah’s flood story was most likely based on when the Med flooded.
There is no geological record for a world wide flood 20k years ago.
There is record of a large age flood which caused some of the western USA structures.
It is simple math to calculate how much water would be required to raise sea levels 100ft.
Don’t take this personally but I’ve taken Geology, Chemical Engineering and Electronics Engineering. Just retired after being in it for 30 years.