Thats assuming that the Mountains were at the same height during the flood. I tend to believe that the continents broke apart during the flood and the mountains raised up in the aftermath of the flood which would probably have included massive volcanic and tectonic activity.
I'm wondering if a glacial dam may have burst ...
Saw a show on PBS that stated there was a MASSIVE pre-historic lake dammed up with a glacial wall. Thousands of trillions of gallons ...
When it broke, it raced to the West Coast [forming the Columbia River] and into the Southweat, where it carved out Monument Valley ...
Same thing in Europe ???
See my prior post or better yet my links page for more information on Dr Walt Brown’s Hydroplate Theory.
It makes the most sense out of all of our geologic history - even the finding of marine fossils on the highest mountaintops.