The Ice Age glaciers and the great flood from Glacial Lake Missoula no more than 10,000 years ago created the canyons, coulees, waterfalls, the fertile hills, and the scablands of Washington and the Pacific Northwest..
These books are recommended. Come see and explore.
Geologists agree that there was just one flood based on the evidence. What do you think?.
Although I do not agree with the uniformitarian assumptions that there was more than one Glacial Lake Missoula Ice Age Flood, the two books by Bruce Bjornstad are excellent books on the flood.
Interesting Books on the Great Ice Age Missoula Flood.