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Oceanic trench

The oceanic trenches are the deepest parts of the ocean floor, typically formed when one tectonic plate slides under another. Major world trenches include:



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... Varennes et de la Vérendrye, (1685-1749), explorer H Hannu[?] - ancient Egyptian who travelled along the Red Sea to a land called Punt Sven Hedin[?], (1865-1952), ...

 
 
 
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