Sedimentary rocks are made up of pieces of older rocks (igneous, metamorphic, and sedimentary) and organic remains (shells, bone, etc.). When rocks break apart from erosion they are transported by ...

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 ...

This is a beginner's guide to identifying UK rock types. The guide has two main sections: background information on the structure and forces affecting the Earth in relation to rock formation a more ...