Across
- 5. a supercontinent that existed during the late Paleozoic and early Mesozoic eras
- 7. the study of the record of the Earth's magnetic field in rocks, sediment, or archeological materials
- 10. a line on a diagram or map connecting points relating to the same time or equal times.
- 11. a theory in geology: the lithosphere of the earth is divided into a small number of plates which float on and travel independently over the mantle and much of the earth's seismic activity occurs at the boundaries of these plates.
- 12. 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
- 13. a linear feature that exists between two tectonic plates that are moving away from each other.
- 14. 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.
Down
- 1. the portion of motion of a tectonic plate that can be accounted for by its subduction
- 2. the gradual movement of the continents across the earth's surface through geological time
- 3. a proposed mechanism for plate motion in plate tectonics
- 4. a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.
- 6. measurement instruments used for two general purposes: to measure the magnetization of a magnetic material like a ferromagnet, or to measure the strength and, in some cases, the direction of the magnetic field at a point in space.
- 8. the process that takes place at convergent boundaries by which one tectonic plate moves under another tectonic plate and sinks into the mantle as the plates converge
- 9. actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
- 11. a type of fault whose relative motion is predominantly horizontal in either sinistral or dextral direction