The Journal of Geology, Vol. 46, No. 3, Part 2 (Apr. - May, 1938), pp. 505-520 (16 pages) A modified variation diagram for plotting groups of chemical analyses of ...
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 ...
PROF. SHAND'S interesting and original book is, as he says in the preface, the outcome of three insistent wishes: first, to clean up the “jungle of rock names;” second, to make the results and ...
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