Time Marches On

4. a fossilized mark that is formed in soft sediment by movement of the animals
6. what is the best place in the north America to record layers of the rock
8. a fossil that is found in the rock layers on only one geologic age is a
9. what had happened 65 million years ago that scientist think the dinosaurs have died of it what was it
10. In 1999 what animal did Vladimir Eisner had found in the Russian lands
12. the standard method used to divide the earths long natural history
15. it is when every living thing of their spices have died is called an
16. what is the age of dinosaurs?
18. a mark or cavity made in a sedimentary surface by organisms
19. is a process in which minerals replace an organisms tissue the process is called
20. a type of fossil that forms when sediment fill in the mold and becomes rock
22. what was the third era
23. one example of an index fossil also known s modern mollusk or a modern squid is called an
24. what was the scientist surname that has wrote the theory of the earth and he is Scottish

1. a principle that states that geologic processes that a occurred in past
2. a geological change that occurs suddenly
3. a famous scientist that had been born in 1788 and his name starts with an J and ends on s
5. a remain that is left when the animal decays
7. subdivision of n era
9. what is another word of tree sap
11. a guy that’s study fossils are called
13. a unit of time by geologist that includes two periods or more
14. what was his name paleontologist who made an important contributions of dinosaurs
17. a subdivision of period
19. what was the first era
21. the largest division of geological time