Cata-, meso-, and epinorms are proposed for metamorphic rocks. The catanorm is essentially the CIPW norm calculated on the basis of molecular percentages and applied to high-grade metamorphic rocks.
Igneous rocks close igneous rockIgneous rocks are those which have been formed by the cooling and solidification of molten rock (magma) from underneath the earth’s crust. are formed by magma from the ...
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