Across
- 1. the portion of motion of a tectonic plate that can be accounted for by its subduction
- 2. the study of magnetic record in rocks
- 5. a large elongated depression with steep walls formed by the downward displacement of a block of the earth's surface between nearly parallel faults or fault systems
- 6. A supercontinent that included all the world's landmasses
- 7. theory that Earth's outer shell is divided into several plates that glide over the mantle
- 9. a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged
- 11. a type of fault whose relative motion is predominantly horizontal in either direction
- 14. a line on a diagram or map connecting points relating to the same time or equal times
Down
- 1. a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge
- 3. two tectonic plates move toward one another and collide
- 4. is the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate and sinks into the mantle
- 8. Wegner's hypothesis
- 10. a linear feature that exists between two tectonic plates that are moving away from each other
- 12. sliding plate force is a proposed mechanism for plate motion in plate tectonics
- 13. measures small changes in magnetic fields