Flood Debris

After stripping away 200 feet of topsoil, the flood ripped away huge boulders from the underlying lava rock. These boulders were picked up and carried in the floods only to be stranded in fields and prairies when the floodwaters subsided. Some boulders, called glacial erratics, were rafted on icebergs and transported great distances from their source by the floods of Glacial Lake Missoula.

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