Mineral assessment tracts in Union county, Pennsylvania

EC01: Sandstone-hosted Pb-Zn (30a) (Paleozoic) , covers 56 % of this area: The number of undiscovered deposits in this tract was not estimated.
EC04: Mississippi Valley, Appalachian Zn (32b) (Late Paleozoic) , covers 93 % of this area: The number of undiscovered deposits in this tract was not estimated.