Across
- 4. the comparison of fossils in different rock layers
- 6. a long, narrow deep inlet formed by glacial erosion
- 9. a type of sediment deposited by glacial ice
- 12. the conditions of an atmosphere at a particular place and time
- 13. the attractive force between all matter
- 14. when a species no longer has living members in existence
Down
- 1. the circulation of water
- 2. certain fossils known to exist in a particular time and place
- 3. all of the fossils that have ever been found
- 5. the remains of ancient animals and plants
- 7. the average weather in a location over 30 years
- 8. a cylinder of ice drilled out of glaciers
- 10. a global climate marked by long periods of cold temperatures
- 11. giant masses of ice that move slowly
- 12. the gravitational force exerted on an object by a planet or moon