We are definitely talking about the huge granite ledge in the middle of our park. I, however, am not concerned with the formation, development, composition, or classification of the granite and am more focused on the ledge's impact on the trail's landscape and fall line...........which is topography. Think about it like if we were to blow up the ledge, as Allison suggested, we would be changing the trails overall landscape and fall line; the topography would change. All of the tiny pieces of granite are still the same though, nothing about what the rock is or how it was made has changed.