Other Crushed and Broken Stone Mining and Quarrying

This U.S. industry comprises: (1) establishments primarily engaged in developing the mine site and/or mining or quarrying crushed and broken stone (except limestone and granite); (2) preparation plants primarily engaged in beneficiating (e.g., grinding and pulverizing) stone (except limestone and granite); and (3)… It has no schema of its own: companies here are mapped on the Universal schema, and what it does not cover is recorded as gaps.