Across
- 5. exploded crater
- 9. sinus shaped wave of earthquake
- 10. the lowest quality of coal
- 12. name of a scale based on measures
- 16. moving crack in a plate
- 17. a kind of wetland
Down
- 1. flat terrain below sea level
- 2. a huge piece of crust
- 3. fuel of airplanes
- 4. bedrock of railways
- 6. official sea level (name of the sea)
- 7. it covers gas and oil in a folded structure
- 8. wind, hydroenergy, biomass, tide, solar energy
- 11. top of the volcano
- 13. porous volcanic rock
- 14. organization of oil producers
- 15. steep sided volcano made by various layers