If you're not familiar with him, look up Central Washington University' Nick Zentner's channel on YouTube -- under his name, not the University's channel. In addition to earlier work, he just finished up an "A to Z" series on the scabland floods and related matters.

Very interesting, and he's a good egg.

I'm a big fan already. I actually found him from his Cascadia Earthquake video:

https://www.youtube.com/watch?v=UJ7Qc3bsxjI (on the University channel)

I highly suggest others check him out too if you're into this stuff.