I don't know if you've been to Purgatory, but I have. As a matter of fact we were stopped there, which in this case is along the coast in Rhode Island, when this gentleman started telling us about the unique rock formations and how and when they were formed. After talking to him for a few minutes we found out that he was from around there and now lives in Florida. I asked him if I could take his photo as part of my 100 strangers project and he graciously obliged.
His name is David Mook, and he is a professor of Geology . . . That explains why he new all about Purgatory. Thanks Dr. Mook for the info and the photo.