Ariana's Crossword
Across
- 2. a proposed mechanism for plate motion in plate tectonics.
- 4. measurement instruments used 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.
- 5. motion of a tectonic plate that can be accounted for by its subduction.
- 8. an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
- 12. a line on an isotope ratio diagram denoting a suite of rock or mineral samples all formed at the same time.
- 13. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
- 14. the movement of the Earth's continents
- 15. a change in a planet's magnetic field such that the positions of magnetic north and magnetic south are interchanged.
Down
- 1. theory that Earth's outer shell is divided into several plates that glide over the mantle, the rocky inner layer above the core.
- 3. a strike-slip fault that offsets a mid-ocean ridge in opposing directions on either side of an axis of seafloor spreading.
- 6. the hypothetical landmass that existed when all continents were joined, from about 300 to 200 million years ago.
- 7. 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.
- 9. a linear feature that exists between two tectonic plates that are moving away from each other.
- 10. magnetic polarization acquired by the minerals in a rock at the time the rock was deposited or solidified.
- 11. continuous geographic trench.