Across
- 1. one type of units geologist use to measure eras
- 3. a layer beath the soil
- 6. spelled like humas
- 7. fossil formed when organism in sediment disolves
- 9. a meander cut of from river
- 10. the lose weathered material on the soil
- 13. a animal with no backbone
- 15. a fossil copy of a organism shape
- 16. happened in 1930s in great plains
- 17. what dinosaurs are now
- 19. how to spell my name
Down
- 2. a soil organism that breaks down and digests them
- 4. large stream
- 5. a large mass of ice
- 8. when many living things extinct at same time
- 11. the distance east or west of the prime meriden
- 12. the amount of sediment in a river or stream
- 14. the grinding away of rock by water or ice and wind
- 18. the sediments deposition drictly by glaciers