history of earth

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Across
  1. 2. a fossil that is useful for dating and correlating the strata in which it is found.
  2. 4. abreak in earths crust
  3. 6. is the science of determining the relative order of past even
  4. 8. affecting the form of a chemical substance, but not its chemical composition
  5. 9. the movement of magma onto the surface of the earth through volcano craters and cracks in the earth's crust, forming igneous rock
  6. 10. the action or process of forcing a body of igneous rock between or through existing formations, without reaching the surface.
Down
  1. 1. tells scientists the number of years ago a rock layer formed
  2. 3. sequence of rocks deposited in layers, the youngest layer is on top and the oldest on bottom
  3. 5. any change that results in the formation of new chemical substances
  4. 7. a surface of contact between two groups