orthopyroxene granite


orthopyroxene granite

      member of the charnockite (q.v.) series of metamorphic rocks.

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Universalium. 2010.

Look at other dictionaries:

  • metamorphic rock — Any of a class of rocks that result from the alteration of preexisting rocks in response to changing geological conditions, including variations in temperature, pressure, and mechanical stress. The preexisting rocks may be igneous, sedimentary,… …   Universalium

  • charnockite — ▪ rock       any member of a series of metamorphic rocks with variable chemical composition, first described from the state of Tamil Nadu in southern India and named for Job Charnock. The term is often limited to the characteristic orthopyroxene… …   Universalium

  • igneous rock — Any of various crystalline or glassy, noncrystalline rocks formed by the cooling and solidification of molten earth material (magma). Igneous rocks comprise one of the three principal classes of rocks, the others being metamorphic and sedimentary …   Universalium

  • Precambrian time — Interval of geologic time from с 3. 8 billion years ago, the age of the oldest known rocks, to 544 million years ago, the beginning of the Cambrian Period. This interval represents more than 80% of the geologic record and thus provides important… …   Universalium

  • Restite — is the residual material left at the site of melting during the in place production of granite through intense metamorphism.Generally, restite is composed of a predominance of mafic minerals because these are harder to melt (see Bowen s reaction… …   Wikipedia

  • Anorthose — Anorthosite Anorthosite lunaire, Musée national d histoire naturelle, Washington, DC. L Anorthosite est une roche phanéritique intrusive et ignée, composée pour la plus grande partie de feldspath plagioclase (90 100%), et d une petite quantité (0 …   Wikipédia en Français

  • Anorthosite — lunaire, Musée national d histoire naturelle, Washington, DC. L Anorthosite est une roche phanéritique intrusive et ignée, composée pour la plus grande partie de feldspath plagioclase (90 100%), et d une petite quantité (0 10%) de composants… …   Wikipédia en Français

  • Anorthosite — (pronEng|æˈnɔrθəsaɪt/, /ə ) is a phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar (90–100%), and a minimal mafic component (0–10%). Pyroxene, ilmenite, magnetite, and olivine are the mafic minerals most… …   Wikipedia

  • Granulite — Granulites are fine to medium–grained metamorphic rocks that have experienced high temperatures of metamorphism, composed mainly of feldspars sometimes associated with quartz and anhydrous ferromagnesian minerals, with granoblastic texture and… …   Wikipedia

  • Charnockite — Late stage charnockite dykes cutting anorthosite, Rogaland, Norway Charnockite (   …   Wikipedia


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