John McPhee's articles on geology
http://www.amazon.com/Annals-Former-World-John-McPhee/dp/0374518734
http://byliner.com/john-mcphee/stories/the-gravel-page
If I could figure out a way to get the money to you I'd buy this book and article for you. They are absolutely incredible.
If you have any inclination, read the stories of the gravel. And if you figure out a way I can get the money to you, I will.