The crust is the thinnest of all the layers of the Earth. It is approximately 35 km in the continents
(land), and only about 5 km under the oceans. The crust is made of minerals, and the main mineral
constituents of the crust in the continental mass are alumina and silica. What is this also known as?
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Answer:
SIAL
Explanation:
si=silica al=alumina
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