Stig Östlund

torsdag, mars 15, 2012

A new theory on the formation of the oldest continents


Bonn, Germany (SPX) Mar 14, 2012 - The earth's structure can be compared to an orange: its crust is the peel supported by the earth's heavy mantle. That peel is made up of a continental crust 30 to 40 kilometers thick. It is much lighter than the thinner oceanic crust and protrudes from the earth's mantle because of its lower density, like an iceberg in the sea.


Read more >> http://www.spacedaily.com/
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Exempel på andra artiklar i proffsinformativa SpaceDaily Your portal to space:


These raw, unprocessed images of Saturn's second largest moon, Rhea, were taken on March 10, 2012, by NASA's Cassini spacecraft
This was a relatively distant flyby with a close-approach distance of 26,000 miles (42,000 kilometers), well suited for global geologic mapping.

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