<P> The continental crust has an average composition similar to that of andesite . The most abundant minerals in Earth 's continental crust are feldspars , which make up about 41 % of the crust by weight , followed by quartz at 12 % , and pyroxenes at 11 % . Continental crust is enriched in incompatible elements compared to the basaltic ocean crust and much enriched compared to the underlying mantle . Although the continental crust comprises only about 0.6 weight percent of the silicate on Earth , it contains 20 % to 70 % of the incompatible elements . </P>
<P> The continental crust has an average composition similar to that of andesite . The most abundant minerals in Earth 's continental crust are feldspars , which make up about 41 % of the crust by weight , followed by quartz at 12 % , and pyroxenes at 11 % . Continental crust is enriched in incompatible elements compared to the basaltic ocean crust and much enriched compared to the underlying mantle . Although the continental crust comprises only about 0.6 weight percent of the silicate on Earth , it contains 20 % to 70 % of the incompatible elements . </P>
whats the composition of the earth 's crust
whats the composition of the earth 's crust
an average composition similar to that of andesite
an average composition similar to that of andesite