| Plate Tectonics May Grind To A Halt, Then Start Again |
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Plate tectonics, the geologic process responsible for creating the Earth's continents, mountain ranges, and ocean basins, may be an on-again, off-again affair. Scientists have assumed that the shifting of crustal plates has been slow but continuous over most of the Earth's history, but a new study suggests that plate tectonics may have ground to a halt at least once in our planet's history -- and may do so again. Read more at: http://www.sciencedaily.com/releases/2008/01/080103144448.htm. |
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