- Knowledge of the production of carbons, minerals and quarry products.
- Institutions that intervene
- General description (main variables)
- Operations, employed personnel by type and sex, hours worked and personnel costs, production by product (quantity and value), stock, destination of the products, power installed, raw materials, explosives, energy consumed, investments. By complete listing
- Establishments or operations of the sector
- Frequency of data collection
- Mensual y anual
- Budgetary credits necessary for its finance in the four-year period 1997-2000 (in thousands pesetas)