Across
- 3. Prehistoric remains found over a period of time
- 4. A scientist who studies solid, liquid, and gas
- 5. A feature that cuts across a sequence of rocks is younger than everything it cuts
- 7. Amount of time it takes for half of a remaining to decay
- 8. Age based on rock layers
- 9. The law of included fragments
- 10. A fossil useful for dating and correlating in strata in which it is found
Down
- 1. Newer layers on top, older layers on the bottom
- 2. Age of something in actual years
- 6. the eon named after hades