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porphyry (pôr'furē) [key], igneous rock composed of large, conspicuous crystals (phenocrysts) and a groundmass in which the phenocrysts are embedded. ... The texture is important in the determination of the circumstances under which the rock formed. The phenocrysts vary in size; the groundmass may be either glassy or made...
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www.infoplease.com/ce6/sci/A0839744.html
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porphyry n. , pl. , -ries . Rock containing relatively large conspicuous crystals, especially feldspar, in a fine-grained igneous matrix ... Some authorities consider the expression "porphyritic rock" better usage than porphyry, since the term refers only to the texture of the rock-not its chemical, physical,
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www.answers.com/topic/porphyry
www.answers.com/topic/porphyry
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pôrˈfərē, igneous rock composed of large, conspicuous crystals (phenocrysts) and a groundmass in which the phenocrysts are embedded. ...
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www.questia.com/library/encyclopedia/101265497
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Porphyry is one of the major igneous rock types. ... That is, "porphyry" refers to a texture, not a composition, just as "satin" refers to a type of fabric rather than the fiber it's made from (see the various igneous rock textures). See other examples of porphyritic texture in the volcanic rocks gallery.
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geology.about.com/od/rocks/ig/igrockindex/pocpicporphyr...
geology.about.com/od/rocks/ig/igrockindex/pocpicporphyry.htm
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Rock containing relatively large conspicuous crystals, especially feldspar, in a fine-grained igneous matrix. ... porphyry - any igneous rock with crystals embedded in a finer groundmass of minerals ... porphyritic; porphyritic rock; Porphyrize; Porphyry shell;
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www.thefreedictionary.com/porphyry
www.thefreedictionary.com/porphyry
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C. Porphyry simulant. Kikkaseki, "stone/rock of chrysanthemum flower" (height - 36 cm), a metamorphic rock that contains radial clusters of carbonate crystals (dolomite, calcite or aragonite) from Gifu Prefecture, central Japan.
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www.cst.cmich.edu/users/dietr1rv/porphyry.htm
www.cst.cmich.edu/users/dietr1rv/porphyry.htm
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Porphyry - Wikipedia, the free encyclopedia
Porphyry (pronounced /ˈpɔrfɪri/ , from the Greek porphyrios "purple-clad") may refer to: •Porphyry (geology), a plutonic rock with large crystals in a fine-grained matrix •Porphyry (philosoph...
en.wikipedia.org/wiki/Porphyry
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AllRefer.com reference and encyclopedia resource provides complete information on porphyry, igneous rock, Geology And Oceanography. Includes related research links. ... You are here : AllRefer.com > Reference > Encyclopedia > Geology And Oceanography > porphyry, igneous rock; By Alphabet : Encyclopedia A-Z > P...
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reference.allrefer.com/encyclopedia/P/porphyry.html
reference.allrefer.com/encyclopedia/P/porphyry.html
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Brief and Straightforward Guide: What is Porphyry? ... Igneous rocks are made of magma that has cooled, and can come in many forms. In the case of porphyry, crystals are formed by the rock undergoing two cooling stages. As magma, the rock first cools slowly, underneath the earth’s crust.
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www.wisegeek.com/what-is-porphyry.htm
www.wisegeek.com/what-is-porphyry.htm
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