Bradford B. Van Diver

I've tried to use this guide a couple of times while in the car, whizzing by the areas described at 55 mph. It really doesn't work well that way. I suspect the way to approach it is to either a: take it on the secondary roads where you can stop and look at things, or, b: read it before going and make notes of the kind of things to look for. New York has great geology that's worth looking into.