How can anyone pinpoint when the flood was in prehistoric history? As in how do you know Civilization A and B were around at the exact same time, and nada? Nothing about a flood?
Also, wouldn't you kind of think the histories of ancient people would have been wiped out in the flood? I'm amazed with earlier in Genesis. Who knew that history to record it? Personally? My best guess is Noah took some scrolls with him, and all other scrolls before the flood were wiped out, just as any box of Wheaties would be wiped out if we tossed it into an oceanic jet stream. The waters themselves would first wash away the ink, and then lay waste to the parchment.