Purchased this historic PA Geology map as an addition to our mountain home in NC PA. It has a wonderful color palette and goes well with our historic map wall.
Some have criticized the small print on the smaller of two available sizes. If you are really interested in interpreting the geologic key, get the bigger size. However, for our purposes it is perfect, as it gives the overall sense of the geology of the state without getting bogged down in the minutia of geologic types.