Wenatchee Valley Geology

How Was the Wenatchee Valley Formed?
How Was the Wenatchee Valley Formed?
How Was the Wenatchee Valley Formed?
I Googled the question “How was the Wenatchee Valley formed.”  It replied: Enormous amounts of gravel and rock debris flooded out the mouth of Moses Coulee south of Rock Island, Washington, and blocked the flow of the Columbia River valley for years at a time, forming large temporary lakes where Wenatchee sits today. -NPSHistory.com  ...