Across
- 4. the process by which plate tectonics produces new oceanic lithosphere at ocean ridges
- 5. a destructive plate margin where oceanic crust is being pushed down into the mantle beneath a second plate
- 6. the permanent magnetization acquired by rock that can be used to determine the location of the magnetic poles at the time it became magnetized
- 7. a boundary in which two plates move together
- 8. a region where the rigid plates are moving apart,typified by the oceanic ridges
- 9. deep faulted structure found along the axes of divergent plate boundaries
Down
- 1. a continuous elevated zone on the floor of all the major ocean basins and varying in width from 1000 to 4000 kilometers
- 2. It involves the oceanic lithosphere sliding down the oceanic ridge under the pull of gravity
- 3. a boundary in which two plates slide past each other without creating or destroying lithosphere
- 6. super continent that 200 million years ago began to break apart and form the present landmasses