Geological time scale

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Across
  1. 5. age dating:the process of determining an age on a specified chronology
  2. 8. fragment in rock
  3. 9. age:age of different rocks
  4. 10. rocks top old rocks bottom
Down
  1. 1. fossils: to find the age of a rock by using there layers
  2. 2. time scale:the calendar for events in earth history
  3. 3. that cuts between a sequence of rocks
  4. 4. of a radioactive sample of decay
  5. 6. of supervision:The Newer layers of rocks will be on top of the older layers of rocks
  6. 7. rock from a long time ago