Across
- 2. An extensive area of land covered by a variety of plants
- 3. highest grade of coal
- 6. deposits of common salt found in the earth
- 8. Minerals that contain high proportion of metal
- 10. Impurities of sand and soil in an ore
Down
- 1. preserved remains of dead organisms in a rock
- 4. Mineral resource used for producing atomic energy
- 5. Black gold
- 7. liquid petroluem gas
- 9. compressed natural gas