glass porphyry

См. также в других словарях:

• Quartz-porphyry — Quartz porphyry, in petrology, is the name given to a group of hemi crystalline acid rocks containing porphyritic crystals of quartz in a fine grained matrix, usually of micro crystalline or felsitic structure. In specimens, the quartz appears as …   Wikipedia

• Витрофир — общий термин для порфировых п., обладающих составом кварцевого порфира или ортофира и стекловатой основной массой. Геологический словарь: в 2 х томах. М.: Недра. Под редакцией К. Н. Паффенгольца и др.. 1978 …   Геологическая энциклопедия

• вітрофір — витрофир glass porphyry, vitrophyre *Vitrophyr збірна назва для склуватих г.п. Звичайно це кварцовий або ортоклазовий порфір зі склуватою основною масою. В. іноді використовують як активну мінеральну добавку до цементів …   Гірничий енциклопедичний словник

• Pythagoras — of Samos redirects here. For the Samian statuary, see Pythagoras (sculptor). For other uses, see Pythagoras (disambiguation). Pythagoras (Πυθαγόρας) …   Wikipedia

• Mosaics — • Includes information on the history and techniques Catholic Encyclopedia. Kevin Knight. 2006. Mosaics     Mosaics     † …   Catholic encyclopedia

• mineral deposit — Introduction       aggregate of a mineral in an unusually high concentration.       About half of the known chemical elements (chemical element) possess some metallic (metal) properties. The term metal, however, is reserved for those chemical… …   Universalium

• copper processing — Introduction  use of smelting or leaching, usually followed by electrolytic refining or recovery, to turn the ore into a form from which products can be fashioned. Included in this article also is a discussion of the mining of copper and of its… …   Universalium

• Monreale —   Comune   Comune di Monreale Interior of the Monreale C …   Wikipedia

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• pitchstone — /pich stohn /, n. a glassy volcanic rock having a resinous luster and resembling hardened pitch. [1775 85; trans. of G Pechstein. See PITCH2, STONE] * * * ▪ natural glass       a volcanic glass with a conchoidal fracture (like glass), a resinous… …   Universalium

• Musée du Louvre — This article is about the museum. For the building, see Palais du Louvre. For higher education, see École du Louvre. For the architectural element, see Louver. Coordinates: 48°51′37″N 2°20′15″E /  …   Wikipedia