I see a lot of ‘roadside geology’ in my Appalachian travels … attempting to check them out on the fly may be the end of me Just yesterday, passing obvious sedimentary rock, tilted ninety degrees ..left me again realizing how difficult it is for poorly, even well educated people to imagine the length of time involved in geologic history. I love it, though to most I’m afraid they’re ‘just rocks & dirt.’ Beautiful poster ~