The Ice Age Floods associated with Glacial Lake Missoula are significant
in the world's geology history. Similar ice age floods occurred elsewhere
in the world, but few were as big and as repetitive.
The floods left a visual legacy that can be seen all along its path, though
few places are as grand as the waterfalls of the Columbia River Gorge.
The floodwaters did not create the Gorge, rather, they scoured and steepened
its walls. Creek junctions with the Columbia were torn away, leaving the
creeks to plunge over the lip of the newly cut gorge in a series of spectacular
to the map...