Across
- 2. the highest rank of coal
- 7. a rock made of oxygen
- 10. rock made from crushed shells
- 12. a rock made of talic meallic
- 13. melted rock
- 14. almost melted rock
- 15. rock made of one mineral
- 16. cooled magma
- 17. rock made out of magma
- 18. rock made from other small rocks
- 19. made of grains of mineral
- 21. rock made out of compressed sand
Down
- 1. a rock made or shells
- 3. rock made of magma
- 4. rock made from water and cold
- 5. a rock made of trash
- 6. rock made from fabric thin layers
- 8. cooled lava
- 9. rock made from reptiles
- 11. a rock thats like chalk
- 20. rock made of fossils and dead animals