Becki Mattern's Crossword Puzzle

3. the study of the record of the Earth's magnetic field in rocks, sediment, or archeological materials.
4. an instrument used for measuring magnetic forces, especially the earth's magnetism.
5. a strike-slip fault that offsets a mid-ocean ridge in opposing directions on either side of an axis of seafloor spreading.
10. sliding plate force is a proposed mechanism for plate motion in plate tectonics.
12. 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.
14. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
15. 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.

1. also known as a destructive plate boundary (because of subduction), is an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide.
2. 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.
6. the portion of motion of a tectonic plate that can be accounted for by its subduction.
7. a linear feature that exists between two tectonic plates that are moving away from each other.
8. a line on a diagram or map connecting points relating to the same time or equal times.
9. the hypothetical landmass that existed when all continents were joined, from about 300 to 200 million years ago
11. Changes in direction or orientation of the magnetic field of the Earth that have occurred from time to time.
13. the movement of the Earth's continents relative to each other, thus appearing to "drift" across the ocean bed.