The bible has very little history to it; it's mostly a narrative that doesn't really jibe with what is objectively proven to be true.
Of course there is.a very very old book that if it was about anything besides God would be a history book. In fact in this country and others for a long time was the first book they learned to read. So many old things are almost revered in secular world ..but not this. It amazes me.
About the flood..the upheavals came from within the earth as well as from above..which probably accounts for the levels archeologists tout for their theories. FOR me just as good a theory plus we have a very great history book to back it up..:)
By the way..I know this will not convince you at all..just had to put my two cents in:)