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