2015-12-11, 10:41
First explanations for boundary within Earth's mantle
Two geologists have provide different, though not necessarily incompatible, explanations for a boundary in Earth's mantle at a depth of one megameter (1,000 kilometers). One study suggests that the mantle below this line is more viscous, while the other proposes that the lower section is denser, due to a shift in rock composition.
http://feeds.sciencedaily.com/~r/science...144707.htm
Two geologists have provide different, though not necessarily incompatible, explanations for a boundary in Earth's mantle at a depth of one megameter (1,000 kilometers). One study suggests that the mantle below this line is more viscous, while the other proposes that the lower section is denser, due to a shift in rock composition.
http://feeds.sciencedaily.com/~r/science...144707.htm