Across
- 7. also known as calcium carbonate
- 8. made by heating clay and limestone
- 10. this rock is formed by subjecting sedimentary rocks to high temperature and pressure
Down
- 1. remains of living organisms found in sedimentary rocks
- 2. example of a metamorphic rock made from limestone
- 3. examples of this rocks are limestone, mudstone and chalk
- 4. never contains fossils,could be intrusive or extrusive
- 5. made by heating powdered limestone with sand and sodium carbonate.
- 6. made by mixing cement, sand, pebbles and water
- 9. limestone is used to neutralise this when it is acidic