Gabbro rock, light micrograph

Gabbro rock, light micrograph

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Caption: Gabbro rock. Polarised light micrograph of gabbro, a coarse-grained igneous rock, formed by the slow and gradual crystallization of basaltic magma at large depth under the Earth's surface. Gabbros are distinguished from other plutonic rocks by their high content of plagioclase-feldspars and pyroxene. Here, the elongate, lamellar feldspars are embedded in a disorganised way in the colourful matrix of pyroxenes and olivine. This image has been obtained using cross-polarised light (or 'crossed nichols').

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Keywords: basaltic magma, coarse-grained, colour, colourful, colours, cross polarised, cross-polarised, cross-polarized, crossed nichols, crystal, crystalline, crystals, earth science, feldspar, gabbro, geological, geology, igneous, light micrograph, light microscope, lm, mineral, mineralogy, minerals, multicoloured, olivine, plagioclase, plm, plutonic, polarised light micrograph, polarised light microscopy, polarized, polarized light micrograph, polarized light microscopy, pyroxene, rock, rocks, section, sectioned

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