What about the scablands?
For the lurkers, the Channeled Scablands are primarily in central and eastern Washington State, and resulted when an ice dam back toward Montana broke (probably many times) at the end of the last Ice Age. This released huge amounts of water which created very distinctive soil formations on the way to the Columbia River and the ocean.
The Channeled Scablands are not proof of a global flood. The ages are pretty well understood (and way too old for the global flood), the limits pretty easy to track (and are not global), and the effects are quite interesting. But, compared to the global flood story, this would have been a leaky faucet.
I did a few field trips to the area in grad school (in paleoecology courses), so have a little experience with the area.
So, What about the scablands?
What about it? Please elaborate.