Evolution is part and parcel of a larger general theory called uniformitarianism, the major tenet of which is that changes in biological and geological forms take place slowly and imperceptibly over immense time spans. There's no way to square that conception with such a finding as we're talking about here.
As far as the flood goes, man has always lived near water and you'd figure the continental shelves are basically just the pre-flood shorelines, and you'd EXPECT most of the ruins of pre-flood civilizations to lie beneath the waves.
In other words, to the evolutionists' question "Where did the flood waters go?", the basic answer is NOWHERE; they're still here. There's just more water now than there used to be.
Actually, it doesn't...by a longshot. The historical dating of pre and post-Noah era has been pretty well established with some certainty. The flood of Genesis dates back to 2300 BC...*after* the pyramids of Giza were built. Think about that.
This city, if it was 6,000 yrs old, would be 1,700 yrs older than the flood.