Mystery of the Megaflood

The movie, "Mystery of the Megaflood," was about a place 200 miles east of Seattle in Washington that is a very weird terrain that is over 100 miles deep with large boulders scattered throughout it. There were different explanations on how the "scablands" got there. One was that there was a river running through it, but there was no river ever actually found. Another explanation was that a glacier had once been sitting on top of the area, but no evidence was ever found of a glacier. Scientist Harlen Bretz figured out that there was a huge flood that came pretty much overnight. People did not think this was possible because it was a "catastrophism". It turns out there was a glacier dam that was holding water from a lake in and it broke which released the water onto the scablands and this is how the scablands formed. This is how the "mysterious megaflood" occured.

Picture of the "mysterious megaflood"