Offered for sale is a lot of 2 United States Geological Survey Geologic Quadrangle Maps for the southwestern are of the state of PENNSYLVANIA, published between 1970 and 1973. Both maps are folded in original envelopes. Maps vary in size when unfolded. See photos for specific contents of this lot. They are in very good condition overall. Some minor age wear to some envelope exteriors. Shipped for FREE!