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The Great Islands Under The Sea

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Bianca
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« Reply #15 on: May 01, 2007, 04:28:03 pm »





THE GREAT ISLANDS UNDER THE SEA                                                                  continued



The case of the submerged Rhine Valley is of special interest, since it runs   
up the North Sea, midway between South Norway and Scotland, before it
disappears, indicating that in fairly recent prehistoric times the intervening
area was dry land. 

This theory has been reinforced by the recent finding of man-made artifacts
on the bottom of the North Sea, with promise of more in the future, as this
oil-rich area is more extensively explored. 

In the late 1920s, the German scientist Alfred Wegener formulated a theory
which had already occurred to a number of cartographers: that of continental
drift.  This theory presupposes that the continents evolved from one single land
mass that drew apart, floating on the Earth's crust, to form the various con-
tinents.

Wegener's theory had the advantage of being easy to demonstrate and under-
standable to anyone who had a world map, since a number of the continental
land masses apparently could be made to fit together like a gigantic puzzle,
were it not for the oceans that separate them.

 
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