Mary Jeanne's Crossword Puzzle

2. the hypothetical landmass that existed when all continents were joined, from about 300 to 200 million years ago.
4. the lateral movement of continents resulting from the motion of crustal plates.
6. the portion of motion of a tectonic plate that can be accounted for by its subduction
7. 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. a theory of global tectonics in which the lithosphere is divided into a number of crustal plates, each of which moves on the plastic asthenosphere more or less independently to collide with, slide under, or move past adjacent plates.
12. a process in which new ocean floor is created as molten material from the earth's mantle rises in margins between plates or ridges and spreads out.
14. is a linear feature that exists between two tectonic plates that are moving away from each other

1. magnetic polarization acquired by the minerals in a rock at the time the rock was deposited or solidified.
3. is where two of the floats - two tectonic plates - side alongside each other
5. 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
8. the process by which collision of the earth's crustal plates results in one plate's being drawn down or overridden by another
10. is an actively deforming region where two (or more) tectonic plates or fragments of the lithosphere move toward one another and collide
11. the slope of the line is related to the age of the rock or mineral suite
13. an instrument for measuring the intensity of a magnetic field, especially the earth's magnetic field
15. sliding plate force is a proposed mechanism for plate motion in plate tectonics