Across
- 1. the comparison of one rock or fossil to another to determine which one is older or younger
- 4. sediment layers that contain pebbles/fragments of the underlying rock units
- 5. the study of earth
- 6. cutting the geologic feature which cuts another is the younger of the two features
- 8. gives age in actual years
- 9. remains of prehistoric organisms
- 10. Sediments deposited or precipitated on the Earth’s surface accumulate in horizontal layers
Down
- 2. the action or process of forcing a body of igneous rock between or through existing formations, without reaching the surface.
- 3. certain organisms lived before others
- 7. the amount of time it takes for the half of an atom to decay