When Glacial Lake Missoula's ice dam shattered ... Note the huge, water-carved potholes known as "kolks" (at right in image). 9. Lenore Caves South of Dry Falls, in a stretch of flood-chiseled ...

Fifteen thousand years ago, during the last Ice Age, a glacial dam collapsed in what ... transported all the way from Idaho by the flood, potholes and plunge pools dug by waterfalls that would ...