Saturday, December 25, 2010

THE EARTH'S GEOLOGY

THE EARTH'S GEOLOGY :-

The earth's rocks are created in a continual cycle . Exposed rocks are weathered and eroded by wind ,water ,and chemicals and deposited as sediments . If they pass into the earth's crust they will be transformed by high temperatures and pressures into metamorphic rocks or they will melt and solidify as igneous rock.

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