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Encyclopedia Britannica - Main :: LEO-LOB |
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LITHOSPHERE (Gr. XLOoc , a stone, and Q4aepa, a sphere) , the crust of the earth surrounding the earth's nucleus. The superficial soil, a layer of loose earthy material from a few feet to a few hundreds of feet in thickness, lies upon a zone of hard rock
character , and composed mainly of sandstones, shales, clays, limestones and metamorphic rocks. These two layers form the lithosphere. All the tectonic movements of the solid nucleus produce changes in the mobile lithosphere. Volcanic and seismic activity is manifested, mountains are folded, levels change , fresh surfaces are exposed to denudation, erosion and deposition. The crust is thus subject to constant
change while retaining its more or less permanent character .End of Article: LITHOSPHERE (Gr. XLOoc , a stone, and Q4aepa, a sphere) If you wish, you can link directly to this article.
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