Title text:
It's great for exfoliating your skin, bones, houses, cities, landscape, etc.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3258/
An acquaintance recieved her masters in geology from a state university in deep Appalachia. (you've probably heard of their football team) All of the professors were YE creationists and rejected plate tectonics.
I don't know any details, because this was years ago and I didn't think to ask questions. So I don't know if these were personal beliefs that you wouldn't know about unless your deep in the dept. or if they were teaching this crap to students.