Michaela Mall

3. the sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate.
4. an actively deforming region where two tectonic plates or fragments of the lithosphere move toward one another and collide.
5. 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
6. andmass that existed when all continents were joined, from about 300 to 200 million years ago
7. a type of fault whose relative motion is predominantly horizontal in either sinistral or dextral direction. Furthermore, transform faults end abruptly and are connected on both ends to other faults, ridges, or subduction zones
9. branch of geophysics concerned with the magnetism in rocks
10. an instrument used for measuring magnetic forces
11. proposed mechanism for plate motion in plate tectonics.
12. Changes in direction or orientation of the magnetic field of the Earth that have occurred from time to time.
13. is 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

1. gradual movement of the continents across the earth's surface
2. 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
8. an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other.
13. portion of motion of a tectonic plate that can be accounted for by its subduction.
14. a line on a diagram or map connecting points relating to the same time or equal times.