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Science → Physical sciences → Earth sciences → Geology → Geology jargon
ANSWERS: 1
  • Alatea
    Earth's crust Uppermost part of the earth. It varies from 30 to 70 kilometres beneath the continents, to only 6 to 8 kilometres beneath the oceans. In geology, a crust is the outer layer of a planet, part of its lithosphere. Planetary crusts are generally composed of a less dense material than that of its deeper layers. The crust of the Earth is composed mainly of basalt and granite. It is cooler and more rigid than the deeper layers of the mantle and core. http://en.wikipedia.org/wiki/Earth's_crust http://www.ackadia.com/general-interest/gems/minerals-glossary.php
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