(The farmers of Eastern Washington benefit from all six of these disasters.)
1. Columbia River Flood Basalts (Basalt is a hard volcanic rock.)
2. Tilting and folding of the earth's crust
3. Ice Age: Cordillern Ice Sheet
4. Missoula Floods
5. Deep Earthquakes: Plate Techtonics and Subduction
6. Exploding volcanoes: Source of top soil in eastern Washington