Across
- 1. based on events on Earth's crust
- 4. based on what organisms were alive
- 6. present is the key to the past
- 8. area made of both soft and hard rock
- 10. rock layer composed of more than 1 type rock
- 11. distance above sea level
- 12. material that glues sediment together
Down
- 1. large, level, uplifted area of land
- 2. mineral that reacts with acid
- 3. flat deposit of rock
- 5. sediment settles in flat layers
- 7. oldest rocks found below youngest rocks
- 9. find a relationship between