Polarised LM of thin section of granite

Polarised LM of thin section of granite

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Credit: ALFRED PASIEKA/SCIENCE PHOTO LIBRARY

Caption: Polarised light micrograph of a thin section of granite, an igneous rock with a complicated mineral assemblage. Quartz, orthoclase & plagioclase feldspars, biotite & chlorite are all present. The variously shaded grey crystals are quartz, the most common mineral found on earth. The mineral biotite shows as a variety of bright interference colours (green, pink, yellow). Magnification x7 at 6x6cm size.

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Keywords: earth science, geological, geology, granite, igneous rock, light micrograph, rock, rocks

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