excellent point and questions. In the last couple of decades scientists have been able to measure and verify drops and raises of hundereds to thousands of feet on the ocean floor, not to mention what is observable on land. If these can happen now because of earthquakes, often more local than the supposed ones during the flood, without wholesale “melting” taking place (though I am certainly amenable to that occurring), Again, I often wish they would rename Noah’s Flood to Noah’s Catastrophe. Virtual oceans of waters below the surface of the earth coming into contact with vast stores of magma would certainly trigger incredible high pressure events that would at least play a significant role in crustal displacement, scientists envisioning explosive events with resulting ejection of materials miles high into the atmosphere. Add countless earthquakes occurring worldwide and the resultant crustal shift. Most, or a lot, of geologists believe all the continents were basically one land map. Now you can imagine the earths crust slowly inching along for millions of years, or throw in a catastrophe involving the equivalent of low and high yield atomic bombs going off dozens or hundreds of time, and I think significant crustal movement might see a more likely outcome. But hey, we weren’t there. Which I think in part is a reason, just one of many, as to why the bible was written. To help those who weren’t there to gain some basic simple understanding of the processes envolved.