Across
- 5. shell on the outside of Earth,
- 6. fracture or discontinuity in a volume of rock
- 7. innermost geologic layer of planet Earth
- 8. surface that is attributed to plate tectonics.
- 9. of silicate rock between the crust and the outer core.
- 10. rigid, outermost shell of a terrestrial-type planet or natural satellite
Down
- 1. of originally planar surfaces, such as sedimentary strata
- 2. third layer of the atmosphere,
- 3. hypothesis that the Earth's continents
- 4. where the volcano is rifting or splitting apart