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Earth’s Building Blocks: The Formation and Composition of Rocks and Minerals
A detailed look at rocks and minerals, the essential building blocks of Earth’s crust. Rocks are naturally occurring solids ...
This article was originally published with the title “Classification of Igneous Rocks” in SA Supplements Vol. 75 No. 1951supp (May 1913), p. 330 doi:10.1038/scientificamerican05241913-330supp ...
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