Source of igneous rocks
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LAVASource of igneous rocks
MAGMAIgneous rock's source
PERIDOTITESGroups of igneous rocks.
MICAConstituent of igneous rocks.
FELDSPARImportant constituent of igneous rocks
aphaniticof igneous rocks, like aphanite, fine-grained
salicpertaining to a group of igneous rocks
panidiomorphicof igneous rocks, having well-developed crystals
doleritesany of various other igneous rocks, as diabase
doleriteany of various other igneous rocks, as diabase
hypocrystallineof igneous rocks, having both glass and crystalline components
pyroxeneany of a group of minerals common in igneous rocks
mesocraticof igneous rocks, containing 30-60 per cent of ferromagnesian minerals
pyroxenesPYROXENE, any of a group of minerals common in igneous rocks
ultramaficRelating to or denoting igneous rocks composed chiefly of mafic minerals
labradoriteA mineral of the plagioclase feldspar group, found in many igneous rocks
muscoviteA silver-gray form of mica occurring in many igneous and metamorphic rocks
leucocraticof igneous rocks, light in colour, due to a low content of iron and magnesium
trichiteany of various minute, hairlike mineral bodies occurring in certain vitreous igneous rocks, esp. obsidian
nephelinicof or like nepheline, a mineral found in igneous rocks and used for ceramics and enamels
albiticthe sodium end member of the plagioclase feldspar group, light-colored and found in alkalic igneous rocks
plutonicnoting or pertaining to a class of igneous rocks that have solidified far below the earth's surface
albitesthe sodium end member of the plagioclase feldspar group, light-colored and found in alkalic igneous rocks
albitethe sodium end member of the plagioclase feldspar group, light-colored and found in alkalic igneous rocks
plagioclaseA form of feldspar consisting of aluminosilicates of sodium and/or calcium, common in igneous rocks and typically white
augitesa usually black or dark green mineral that consists of aluminous pyroxene and is found especially in igneous rocks
augitea usually black or dark green mineral that consists of aluminous pyroxene and is found especially in igneous rocks
oligoclaseA feldspar mineral common in siliceous igneous rocks, consisting of a sodium-rich plagioclase (with more calcium than albite)
andesinemineral, intermediate in the plagioclase feldspar group, having a play of colors and usually found as crystals in igneous rocks
silltabular body of igneous rock injected while molten between sedimentary or volcanic beds or along foliation planes of metamorphic rocks
ultrabasicRelating to or denoting igneous rocks having a silica content less than 45 percent by weight, most of which are also ultramafic
nephelineA colorless, greenish, or brownish mineral consisting of an aluminosilicate of sodium (often with potassium) and occurring as crystals and grains in igneous rocks
sanidineglassy, often transparent variety of orthoclase in which sodium may replace as much as 50 percent of the potassium: forms phenocrysts in some igneous rocks
sanidinesglassy, often transparent variety of orthoclase in which sodium may replace as much as 50 percent of the potassium: forms phenocrysts in some igneous rocks
olivinesany of a group of magnesium iron silicates, (Mg,Fe)2SiO4, occurring in olive-green to gray-green masses as an important constituent of basic igneous rocks
olivinicany of a group of magnesium iron silicates, (Mg,Fe)2SiO4, occurring in olive-green to gray-green masses as an important constituent of basic igneous rocks
biotitesvery common mineral of the mica group, occurring in black, dark-brown, or dark-green sheets and flakes: an important constituent of igneous and metamorphic rocks
effusivenoting or pertaining to a class of igneous rocks that have been forced out in a molten or plastic condition upon the surface of the earth
olivineany of a group of magnesium iron silicates, (Mg,Fe)2SiO4, occurring in olive-green to gray-green masses as an important constituent of basic igneous rocks
biotitevery common mineral of the mica group, occurring in black, dark-brown, or dark-green sheets and flakes: an important constituent of igneous and metamorphic rocks