Science

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Across
  1. 4. process of a unstable atomic nucleus losing energy by radiation
  2. 6. layer of rock or soil
  3. 8. principal of geology that crosses
Down
  1. 1. process of determining age
  2. 2. related to the current geological age
  3. 3. A fossil thats useful for dating
  4. 5. a system of dating that relates to geology of time
  5. 6. relative order of past events
  6. 7. The principal of inclusions
  7. 8. axiom that forms one of the bases of science and geology