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Tectosphere

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tectosphere [′tek·tə‚sfir]
(geology)
The region of the earth's crust occupied by the tectonic plates.

Tectosphere 

the outer shell of the earth. The tectosphere comprises the crust and upper mantle and is the principal region of occurrence of tectonic and magmatic processes. It is characterized by vertical and horizontal nonuniformity of the physical properties and composition of its constituent rocks.



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Photo: Many scientists now believe that the plates (or the tectosphere, denoted by the white line extending from left) are much thicker and colder under continents than under oceans.
 
 
 
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