thetrueone,
Since you're so fond of cut and paste...
http://www.answersingenesis.org/articles/am/v2/n2/universality-of-flood
Noah’s Flood is critically important to the question of the age of the earth, as explains Dr. Terry Mortenson in his article on p. 62. For over eighteen centuries virtually all Christians understood Genesis to recount a universal Flood that completely covered the whole earth, leaving no dry land anywhere at the height of the event. However, during the past 200 years many Christians have been swayed by secular ideas and have abandoned the clear hermeneutic of Scripture for belief that the Flood was local and covered only the Mesopotamian Valley of the Tigris and Euphrates rivers (the area of modern-day Iraq). But such a view cannot stand under the careful scrutiny of Genesis 6–9 . Consider these points.
The Depth of the Flood
One of the most important biblical arguments for a universal (i.e., global) Flood is the statement of Genesis 7:19–20 , which says, “ And the waters prevailed exceedingly upon the earth; and all the high hills that were under the whole heaven were covered. Fifteen cubits upward did the waters prevail; and the mountains were covered ” (KJV).
You do need not be a professional scientist to realize the tremendous implications of these biblical statements. If the highest mountains 1 were covered with water, the Flood would have been global in geographical extent, for water must seek its own level—and it must do so quickly!
The phrase “ fifteen cubits upward did the waters prevail ” does not mean that the Flood was only 15 cubits deep, for the phrase is qualified by the one which immediately follows: “ and the mountains were covered. ”
Because Genesis 6:15 tells us that the height of the Ark was 30 cubits, nearly all commentators agree that the phrase “fifteen cubits” in 7:20 must refer to how deep the Ark sank into the water when it was fully laden. Such information adds further support for a universal Flood, because it tells us that the Flood “prevailed” over the tops of the highest mountains to a depth of at least 15 cubits. If the Flood had not covered the mountains by at least such a depth, the Ark could not have floated over them during the five months in which the waters “prevailed” upon the earth.
Now, if you think you know better than Dr. Terry Mortenson I'd be interested in your views.