Mystery of the Mega Flood

In the movie, Mystery of the megaflood, there is a large terrain about 200 miles east of Seattle called the “scablands”. The reason for its names is because they are is filled with hills and valleys that appear to be formed by great amounts of water. No one really understood why these ripple effects had taken place because there had been any evidence of any type of flowing water. One man named Harlen Bretz brought up an idea that the scablands had actually had a massive flood that made this hills and valleys. Many people thought are idea was absurd until Joseph Pardee helped him go deeper into his mission about solving this mystery.  Pardee discovered an area in Montana where the Great Lakes use to be and he believes that I the dam to the lakes had broken, maybe the lake water had flown into the scablands. The problem was that the dam was a massive iceberg and many highly doubted that it would break. Well, later in Iceland the same thing had happened and it solved the mystery.