This is a preview. Log in through your library . Abstract The formation of quartzo-feldspathic rocks-principally pegmatites-is discussed from the viewpoint of thermodynamic stability of minerals and ...

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 ...

Scientific American is part of Springer Nature, which owns or has commercial relations with thousands of scientific publications (many of them can be found at www ...