Across
- 2. dating gives age in actual age
- 5. older rock at the bottom and younger at the top
- 7. is the amount of time it half of an isotope to decay to a daughter product
- 9. a branch of geology dealing with the arrangement of sedimentary rock layers or strata
- 10. indicates to geologists the boundaries in geological time
Down
- 1. inserting a knife into a cake and removing a piece
- 3. rock found inside of other rocks the older are the chunks
- 4. a scientist who studies the earths crust
- 6. deterimes the relative order of past events
- 8. radioactive decay of isotope represents a period of time