Across
- 3. portion of motion of a tectonic plate that can be accounted for by its subduction
- 5. explaining the structure of the earth's crust
- 9. process that occurs at mid-ocean ridges
- 10. the study of the magnetic record in rocks
- 13. is a linear feature that exists between two tectonic plates that are moving away from each other
Down
- 1. the hypothetical landmass that existed when all continents were joined
- 2. a large elongated depression with steep walls
- 4. a major geologic discontinuity or suture markings
- 5. a strike-slip fault that offsets a mid-ocean ridge in opposing directions on either side of an axis of seafloor spreading
- 6. the gradual movement of the continents
- 7. a proposed mechanism for plate motion
- 8. changes in direction or orientation
- 11. an instrument used for measuring magnetic forces
- 12. the sideways and downward movement of the edge of a plate of the earth's crust
- 14. a line on a diagram or map connecting points