Types of rocks

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Across
  1. 1. An igneous rock characterised by its texture; with many holes.
  2. 6. A rock formed when shale or mudstone undergoes metamorphism.
  3. 7. A non-clastic sedimentary rock formed from the remains of plants and animals.
  4. 9. A type of rock made from compacted and cemented sediment.
  5. 11. A sedimentary rock made from compacted sand.
  6. 12. A coarse-grained igneous rock often used for countertops.
  7. 13. One of the three major rock types; made from cooled magma.
Down
  1. 2. A sedimentary rock with large, rounded pebbles.
  2. 3. An extrusive igneous, fine-grained rock commonly found on the seafloor.
  3. 4. The term that describes rocks that are lighter in colour and rich in Si.
  4. 5. A feature commonly used to distinguish metamorphic rocks.
  5. 8. The parent rock; the type of rock before metamorphism occurs.
  6. 10. An extrusive igneous rock with a glassy texture.