Georgia Longleaf Pine trees ? in rock

Description:

This is Stone Mountain in Georgia. The Mountain is a type of granite that has quarts in it. At the top of Stone Mountain, there are cracks and crevices that collect rainwater and soil enough for some trees to grow. Most look like Pine trees, but the 5th picture might not be a pine tree.

Notes:

The trees seem as out of place as the big rock in the relatively flat Atlanta area. They grow much fatter around their trunk than in the forests below, perhaps because there are fewer of them and they have shallower roots? I am not certain and could find very little info the day I was there because of the pop-up storm. For more info about the geology and plants and wildlife Wiki has a decent page. Oddly, it doesn't mention the pine trees. I took these pictures from the bottom, looking up, as I was walking into the "Crossroads" southern town. http://en.wikipedia.org/wiki/Stone_Mount... Storms rolled in, so we weren't able to go to the top that day. In fact, they were trying to get people off the top when the storm rolled in.