Across
- 2. long-term weather conditions affecting an area
- 7. horizontal tunnel dug into a hillside
- 8. where water is injected below or natural gas injected above the oil to maintain pressure
- 10. impermeable rock that does not transmit water
- 12. material is scraped or sucked from the river or sea bed.
- 13. when too little rock is extracted
- 15. energy extracted from hot subsurface rocks or water
- 16. height difference between water table and water level in well
- 17. where tributaries meet and water and sediment from other sources is added.
- 19. liquids that do not mix
- 20. red tropical soil made of hydrated iron and aluminium oxides.
- 21. metalladen solution produced by in situ or heap leaching.
- 23. insoluble products of chemical weathering
- 24. rotational downwards and outwards of movement of incompetent rock and material.
- 25. forms when minerals precipitate into a fracture
Down
- 1. comprise waste piled up on the ground
- 3. zone of high grade ore just below the water table formed by secondary enrichment
- 4. insoluble cap of iron oxides at the surface
- 5. percentage of carbon in coal
- 6. releasing water stored behind a dam to turn a turbine to generate electricity
- 9. is a useful and valuable natural material
- 11. mining from surface quarries
- 14. large igneous intrusion below a volcano with a porphyritic texture.
- 18. uncontrolled oil gush to the surface
- 22. a geological situation that concentrates petroleum in one place