Across
- 3. a scientist who specializes in the study of life forms that existed in previous geologic periods
- 4. pertaining to the present era, beginning 65 million years ago
- 6. to thrust out, force or press out
- 8. an organism outline of a fossil
- 11. The geologic age of a fossil organism, rock, or geologic feature or event given in units of time
- 13. a fossil that is useful for dating and correlating the strata in which it is found
- 15. the period of time to which anything belongs or is to be assigned
- 16. pertaining to an era occurring between 230 and 65 million years ago
- 17. to thrust or force into
- 18. pertaining to the earliest era of earth history, ending 570 million years ago
- 19. a hollow form or matrix for giving a particular shape to something in a molten or plastic state
Down
- 1. to receive form in a mold
- 2. having been turned to stone
- 5. one of a class of substances that cannot be separated into simpler substances by chemical means
- 7. a fossil of a footprint, trail, or burrow
- 9. pertaining to an era occurring between 570 million and 230 million years ago
- 10. cracks in the earth's crust along which there is movement
- 12. mineral or organic matter deposited by water, air, or ice
- 14. any remains, impression, or trace of a living thing of a former geologic age
- 15. particular period of time marked by distinctive features