Josh's geology crossword!

12345678910111213141516171819
Across
  1. 2. An igneous rock formed slowly from magma underground, often creating crystals
  2. 4. Water or wind depositing igneous or metamorphic rock sediment
  3. 7. A red-brown extrusive rock with many air holes, often used in gardens
  4. 8. Magma which has broken through the earth, usually via a volcano
  5. 10. A common scale used to identify the hardness of a mineral or rock
  6. 11. The hardest naturally occurring substance
  7. 13. Natural but usually not organic substances found in the earth's crust
  8. 14. A metamorphic rock used for benchtops and some architecture
  9. 17. An igneous rock formed quickly from lava after it cools above ground, not containing crystals
  10. 18. A person who studies rocks
  11. 19. Rock that used to be molten (a liquid) and underground
Down
  1. 1. The giver of knowledge
  2. 3. Rock that has transformed, usually by pressure or heat
  3. 5. A very soft mineral
  4. 6. An intrusive rock which usually consists of the minerals quartz, feldspar and mica
  5. 9. The remains of an organic substance, found only in sedimentary rock
  6. 10. Molten rock in the earth
  7. 12. The study of rocks
  8. 15. An organic sedimentary rock made mostly of calcite
  9. 16. Rock that has formed by sediment being deposited by water or wind