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Plate Tectonics
Beginning of paper
The main features of are:
The Earth's surface is covered by a series of crustal plates.
The ocean floors are continually, moving, spreading from the center, sinking at the edges, and being regenerated.
Convection currents beneath the plates move the crustal plates in different directions.
The source of heat driving the convection currents is ....
Middle of paper
....Seismic studies show that the mid-oceanic ridges experience an elevated number of earthquakes. All these observations indicate intense geological activity at the mid-oceanic ridges.
Geomagnetic Anomalies
Peridically, the Earth's magnetic field reverses. New rock formed from magma records the orientation of Earth's magnetic field at the time th.... |
| Word count: 819 |
Page count: 3 |
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