Mason's Puzzle

1. is the portion of motion of a tectonic plate that can be accounted for by its subduction.
4. is the study of the record of the Earth's magnetic field in rocks, sediment, or archaeological materials.
6. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
7. a line on a diagram or map connecting points relating to the same time or equal times.
10. 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.
12. A change in the Earth's magnetic field resulting in the magnetic north being aligned with the geographic south, and the magnetic south being aligned with the geographic north
14. is the movement of the Earth's continents relative to each other, thus appearing to "drift" across the ocean bed.

1. process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.
2. Places where plates slide past each other
3. outer rigid layer of the earth (the lithosphere) is divided into a couple of dozen "plates" that move around across the earth's surface relative to each other, like slabs of ice on a lake.
5. an instrument used for measuring magnetic forces, especially the earth's magnetism.
8. 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.
9. was a supercontinent that existed during the late Paleozoic and early Mesozoic eras.
11. or divergent plate boundary (also known as a constructive boundary or an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other.
13. sliding plate force is a proposed mechanism for plate motion in plate tectonics.