Across
- 4. the amount of time it takes for one half of a remaining isotope to decay to a daughter product.
- 6. The rule that states an undisturbed sequence of rocks, the top layer of the sequence will always be younger than the bottom layer.
- 8. remains of a once living organism preserved in a rock
- 9. the current era we live in today
- 10. process to determine if a rock or layer of rocks are older or younger than another rock or rock layer
Down
- 1. useful for dating and correlating the strata in which it's found.
- 2. states any rock or fragment that's included inside another rock is older than the rock in which is included.
- 3. layer
- 5. states any feature that cuts across a sequence of rocks, is younger than anything it cuts.
- 7. shows the exact age of a rock or fossil