| A | B |
|---|
| Mesosaurus | a fresh water swimming reptile |
| divergent boundary | boundary where plates are moving apart |
| convergent boundary | boundary where plate are coming together |
| sliding boundary | boundary where plates slip horizonatal pass one another. |
| Rift valleys | Occurs when a divergent boundary begins under a continental plate |
| Alfred Wegener | First proposed continental drift |
| Pangaea | supercontinent formed 250 million years ago |
| Rodinia | supercontinent that formed 750 million years ago |
| Plate tectonics | the study of the formation and movements sections of the Earth's lithosphere. |
| Asthenosphere | Partial melted layer of the mantle upon which the lithosphere floats |
| Thin skinned thrusting | The pushing of thin, horizontal sheets of rock from continental margins over great distances along nearly level fault surfaces. |
| terranne | a large block of lithospheric plate that has been moved over thousands of kilometers and attached to the edge of a continent. |
| craton | oldest and most altered rocks of a continent |
| Collision boundary | Location where two continental plates are colliding |
| Subduction boundary | A location where one plate plunges down under another |
| fault | a break or crack in the Earth's crust along which movement has occurred |
| heat flow | measure of the amount of heatleaving rocks of the lithosphere |
| shield | portion of a craton exposed at the Earth's surface |
| spreading center | area of the Earth where lithospheric plates are moving apart |
