Constriction at Wallula Gap creates Lake Lewis during Ice Age Floods

September 09, 2013  •  Leave a Comment
Constriction at Wallula Gap creates Lake Lewis during Ice Age Floods: "Geologic evidence suggests that Lake Missoula floods occurred at least 89 times, and Lake Lewis would have functioned as a temporary impoundment during most if not all of these events. But many geologists believe that there were many more floods--some of them from sources other than Lake Missoula, and others taking place at much earlier dates than the Lake Missoula floods. If so, Lake Lewis probably existed at these times as well, because the Columbia Basin, its rivers, the Horse Heaven Hills, and Wallula Gap all predated the Pleistocene Ice Age." 'via Blog this'

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