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Kramer
Kramer Geology Chapter 17 Advanced
| Question | Answer |
|---|---|
| Place where two of Earth's tectonic plates are moving toward each other; is associated with trenches, island arcs, and folded mountains | Convergent boundary |
| Wegener's hypothesis that Earth's continents were joined as a single landmass, called Pangaea, that broke apart about 200 million years ago and slowly moved to their present positions. | Continental drift |
| Place where two of Earth's tectonic plates are moving apart; is associated with volcanism, earthquakes, and high heat flow, and is found primarily on the seafloor | Divergent boundary |
| Line on a map that connects points of the same age | Isochron |
| Changes in Earth's magnetic field over geologic time, recorded in ocean-floor rocks and continental basalt flows | Magnetic reversal |
| Device used to map the ocean floor that detects small changes in magnetic fields | Masgnetometer |
| Study of Earth's magnetic record using data gathered from iron-bearing minerals in rocks that have recorded the orientation of Earth's magnetic field at the time of their formation | Paleomagnetism |
| Ancient landmass made up of all the continents that began to break apart about 200 million years ago | Pangaea |
| Tectonic process associated with convection currents in Earth's mantle that occurs when the weight of an elevated ridge pushes an oceanic plate toward a subduction zone | Ridge push |
| Long, narrow depression that forms when continental crust begins to separate at a divergent boundary | Rift Valley |
| Hess's theory that new ocean crust is formed at mid-ocean ridges and destroyed at deep-sea trenches; occurs in a continuous cycle of magma intrusion and spreading | Seafloor spreading |
| Tectonic process associated with convection currents in Earth's mantle that occurs as the weight of the subducting plate pulls the trailing lithosphere into a subduction zone | Slab pull |
| Process by which on tectonic plate slips beneath another tectonic plate | Subduction |
| States that Earth's crust and upper mantle are broken into plates, which are huge rock slabs that move in different directions and at different rates over Earth's surface | Theory of Plate Tectonics |
| Place where two tectonic plates slide horizontally past each other that is characterized by long faults and shallow earthquakes | Transorm boundary |
Created by:
marilyn.kramer
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