I want to know the answer to the following question:
What does the Great Appalachian Valley do?
All the background I'm provided with is that "A remarkable feature of the belt is the longitudinal chain of broad valleys, including The Great Appalachian Valley, which in the southerly sections divides the mountain system into two unequal portions, but in the northernmost lies west of all the ranges possessing typical Appalachian features, and separates them from the Adirondack group.". Is that enough to answer the question?