Dunite rock, light micrograph

Dunite rock, light micrograph

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Credit: DIRK WIERSMA/SCIENCE PHOTO LIBRARY

Caption: Dunite rock. Polarised light micrograph of dunite, an ultramafic (low silica content) rock consisting nearly entirely of olivine. Here, the olivine (coloured due to the polarisation), forms a granular, densely packed structure. Dunite also usually contains some chrome-spinel, which is opaque and thus black here in this thin section. This image has been obtained using cross-polarised light (or 'crossed nichols').

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Keywords: chrome-spinel, colour, colourful, colours, cross polarised, cross-polarised, cross-polarized, crossed nichols, crystal, crystalline, crystals, dunite, earth science, geological, geology, light micrograph, light microscope, lm, mineral, mineralogy, minerals, multicoloured, olivine, plm, polarised light micrograph, polarised light microscopy, polarized, polarized light micrograph, polarized light microscopy, rock, rocks, section, sectioned, ultramafic

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