The s i a l layer of the Earth is made up of material rich in dash and dash
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the sial layer of the Earth is made up of material rich in silica and aluminum
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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. ... Geologists often refer to the rocks in this layer as felsic, because they contain high levels of feldspar, an aluminium silicate mineral series.
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