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Glacial Lake Columbia (west) and Glacial Lake Missoula (east) are shown south of the Cordilleran Ice Sheet. The areas inundated in the Columbia and Mi
Glacial Lake Columbia (west) and Glacial Lake Missoula (east) are shown south of the Cordilleran Ice Sheet. The areas inundated in the Columbia and Missoula floods are shown in red.
Glacial Lake Missoula high-water mark, 4200 ft.
Glacial Lake Missoula high-water mark, 4200 ft.
Illustration of the glacial flows leading to formation of several parts of the trail
Illustration of the glacial flows leading to formation of several parts of the trail
Moses Coulee at mid canyon
Moses Coulee at mid canyon
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Wave-cut strandlines cut into the slope at left in photo. These cuts record former high-water lines, or shorelines. Gullies above the highway are the
Wave-cut strandlines cut into the slope at left in photo. These cuts record former high-water lines, or shorelines. Gullies above the highway are the result of modern-day erosion. (NPS Photo)
Sediment deposited by the lake with a hammer for scale.
Sediment deposited by the lake with a hammer for scale.