Across
- 4. A dark, fine-grained volcanic rock.
- 8. A common type of hard, igneous rock often used in construction.
- 9. A sedimentary rock mainly composed of calcium carbonate.
- 10. A sedimentary rock composed of sand-sized mineral particles.
Down
- 1. A soft, white, porous sedimentary rock.
- 2. A naturally occurring volcanic glass.
- 3. A metamorphic rock known for its use in sculpture and architecture.
- 5. A fine-grained metamorphic rock used for roofing.
- 6. A hard mineral found in many types of rocks.
- 7. A hard type of sedimentary cryptocrystalline form of the mineral quartz.