what is sial an sima
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In geology, the term 'sial' refers to the composition of the upper layer of the Earth's crust, namely rocks rich in silicates and aluminium minerals. It is sometimes equated with the continental crust because it is absent in the wide oceanic basins, but "sial" is a geochemical term rather than a plate tectonic term.
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Answer:
sial (si-silica and al- aluminium)
sima-(silica and ma- magnisium)
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