Petrography 1


Petrography 1 :

(n.) Geology. The examination of rocks in thin section. Rock samples can be glued to a glass slide and the rock ground to 0. 03-mm thickness in order to observe mineralogy and texture using a microscope. (A petrographic microscope is a transmitted-light polarizing microscope.) Samples of sedimentary rock can be impregnated with blue epoxy to highlight porosity. See: Birefringence, Petrology, Porosity, Sedimentary

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