Vast beds of anthracite coal exist in Pennsylvania and are mined at depths up to 600 m (2,000 ft). Iron and Zinc are also produced in the Valley and Ridge province, mined from the minerals hematite (iron) and sphalerite (zinc).
Extensive anthracite coal reserves exist in Pennsylvania and are extracted at depths reaching up to 600 meters (2,000 feet). Iron and zinc are also produced in the Valley and Ridge province, mined from hematite (iron) and sphalerite (zinc).