Hills near Fort Spokane

ID: 4714 ~ Source: Photo taken by author ~ Creator: Charlie Byers
This file appears in: Carving the Columbia

These gentle slopes scattered with rocks are typical of "moraine" landscapes, carved by the slow movement of glaciers.

This file appears in: Carving the Columbia

By Charlie Byers
Between 18,000 and 13,000 years ago, glaciers advanced and retreated over northern Washington. This ice formed a fragile dam on the Clark Fork River, which slowly filled with water, creating glacial Lake Missoula. The lake spanned hundreds of miles…