Evolutionary geologists assigned long periods of time to the formation of the 40,000 square km Channeled Scablands of Eastern Washington. In the ‘70’s they finally acknowledged that this vast geologic formation which includes the Grand Coulee was formed mostly in two days as a result of a catastrophic event.
Wanajiolojia wa mageuzi walitenga muda mrefu katika kufanya kilomita 40,000 mraba kupitia Scabland Washington Mashariki. Miaka ya 70 walitambua ya kwamba ukubwa wa maumbile kijiolojia iliyohusu Grand Coulee ilifanyika kwa siku mbili kutokana na tukio la machafuko.