great video, thanks John! its kims brother phil d btw, didnt know this was your field, cant wait to bother you about geology, w00t!

Really enjoying this presentation. Pausing partway through to comment. Analogies work really well for me. I’m not a geologist, but am an enthusiast who lives in a very geologically rich area of North America. A few thousand kilometres north of this presentation topic area. Maybe kilometres gives away my location, eh? But I find a lot of what happened and was studied down in your neck of the woods explains what has happened up here. Appreciate your style of presentation.

THAt was greaT! Makes me want to take a class from him.

Bentonite and Montmorillionite are really interesting clays. Great lecture!! Time to re up with GSOC!! JennFrykman

Excellent presentation!