Megafloods of the Ice Age: About 15,000 years ago, in the waning millennia of the Ice Age, a vast lake known as Glacial Lake Missoula suddenly burst through the ice dam that plugged it at one end. In the space of just 48 hours, geologists believe, the collapse sent 500 cubic miles of water cascading across the Pacific Northwest, creating overnight such unusual landscapes as the scablands of eastern Washington State. http://www.pbs.org/wgbh/nova/earth/megafloods-of-the-ice-age.html
The Hero: A geologist named J. Harlen Bretz, proposed in the 1920s that the topography of eastern Washington State was the result of a massive catastrophic flood. He named this area of eastern Washington the Channeled Scablands. The idea that sites such as the Palouse Falls Gorge were the results of floods was thought to be outrageous, and described by some as near lunacy since the area receives very little rainfall today. It took many decades for Harlen Bretz to finally receive the credit he deserved. In fact, it was not until the area was observed from the air that many of the Scabland features were accepted as flood deposits, such as the giant ripples in the Misoulla Valley, which are up to 30 feet high and 250 feet apart.
Almost fifty years following his original proposal, Bretz was hailed as a hero, and in 1979, at the age of 96, he was given geology’s highest honor — the Penrose Medal, which rewards one researcher each year for exceptional contributions to geology. The Channeled Scablands have now been dedicated to Harlen Bretz, and it is commonly known that this area was destroyed by a massive flood catastrophe. Source: http://www.nwcreation.net/scablands.html
Interesting stie with interactive and a video: http://hugefloods.com/Scablands.html
NOVA interactive website: http://www.pbs.org/wgbh/nova/earth/explore-the-scablands.html
Channeled Scablands; Scientific Bias Against Catastrophism: http://www.nwcreation.net/scablands.html
Ice Age Floods (YouTube video) http://www.youtube.com/watch?v=5Na-yPW-52I