myrmekite structure

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Myrmekite — describes a vermicular, or wormy, intergrowth of quartz in plagioclase. The intergrowths are microscopic in scale, typically with maximum dimensions less than 1 millimeter. The plagioclase is sodium rich, usually albite or oligoclase. These… … Wikipedia
Rock microstructure — includes the texture of a rock and the small scale rock structures. The words texture and microstructure are interchangeable, with the latter preferred in modern geological literature. However, texture is still acceptable because it is a useful… … Wikipedia
SILICE — Le dioxyde de silicium ou silice occupe, parmi les oxydes, une place exceptionnelle; en effet, par ses propriétés cristallochimiques, par ses modes de genèse, par son importance pétrographique, il s’apparente étroitement aux silicates. Dans la… … Encyclopédie Universelle
Micrographic texture — In petrology, micrographic texture is a fine grained intergrowth of quartz and alkali feldspar, interpreted as the last product of crystallization in some igneous rocks which contain high or moderately high percentages of silica. Micropegmatite… … Wikipedia

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