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Hyalopilitic




Hyalopilitic is a textural term used in petrographic classification of volcanic rocks. Specifically, hyalopilitic refers to a volcanic rock groundmass, which is visible only under magnification with a petrographic microscope, that contains a mixture of very fine-grained mineral crystals either mixed with natural volcanic glass, or surrounded by thin bands of volcanic glass.

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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Hyalopilitic". A list of authors is available in Wikipedia.
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