Even the non-geologists in our group really appreciated having such an exellent guide explaining the geology of the area. As much as enjoy the fact that Sam likes doing all this geologizing with me, I think her true scientific future lies in herpetology, as she spent most of the hike looking for frogs. Here she is looking for frogs in one of the potholes.
and later on Callan pointed out a lizard, which she quickly caught.
We ended the hike at the Great Falls of the Potomac, which due to the water levels being low were mostly rock.