basic plagioclase

См. также в других словарях:

• Plagioclase — A photomicrograph of a plagioclase crystal under cross polarized light. The plagioclase crystal shows a distinct banding effect called a Polysynthetic twinning. (unknown scale) General Category …   Wikipedia

• plagioclase — plagioclastic /play jee euh klas tik/, adj. /play jee euh klays /, n. any of the feldspar minerals varying in composition from acidic albite, NaAlSi3O8, to basic anorthite, CaAl2Si2O8, found in most igneous rocks: shows twinning striations on… …   Universalium

• Theralite — (from Greek to pursue ) is, in petrology, a group of plutonic holocrystalline rocks consisting of nepheline, basic plagioclase, augite and olivine, and so called because of its rare occurrence. Its discovery was looked forward to with interest as …   Wikipedia

• trachybasalt — “+ noun Etymology: German, from trachy + basalt : a rock that is intermediate in composition between trachyte and basalt and that contains both orthoclase and basic plagioclase * * * /tray kee beuh sawlt , bas awlt, bay sawlt, trak ee /, n. a… …   Useful english dictionary

• basalt — noun Etymology: Latin basaltes, manuscript variant of basanites touchstone, from Greek basanitēs (lithos), from basanos touchstone, from Egyptian bḫnw Date: 1601 a dark gray to black dense to fine grained igneous rock that consists of basic… …   New Collegiate Dictionary

• theralite — /thear euh luyt /, n. a coarse grained, phaneritic rock composed of labradorite, nepheline, and augite. [ < Gk théra hunting + LITE; said to be so called because success in hunting it down was thought to be certain] * * * ▪ mineral       any… …   Universalium

• ceramicite — sə̇ˈraməˌsīt noun ( s) : a porcelainlike pyrometamorphic rock consisting of basic plagioclase and cordierite with accessory hypersthene and a groundmass of glass …   Useful english dictionary

• granogabbro — “+ noun Etymology: grano + gabbro : a plutonic rock intermediate between a granite and a gabbro and consisting of quartz, basic plagioclase, potash feldspar, and one or more ferromagnesian minerals …   Useful english dictionary

• navite — ˈnāˌvīt noun ( s) Etymology: German navit, from Latin Nava Nahe river, Germany + German it ite : a mineral consisting of a coarse grained olivine basalt with phenocrysts of altered olivine and a little augite and basic plagioclase in a… …   Useful english dictionary

• schönfelsite — ˈshōnˌfelˌzīt, ˈshə(r)n noun ( s) Etymology: German schönfelsit, from Altschönfels, Saxony, Germany + German it ite : a feldspar free basalt with phenocrysts of olivine and augite in a dense groundmass of titanomagnetite, orthorhombic pyroxene,… …   Useful english dictionary

• syenogabbro — “+ noun Etymology: syenite + o + gabbro : a plutonic rock composed of basic plagioclase, less orthoclase, and a dark mineral (as augite) …   Useful english dictionary