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A list of all unique rock types recognized by petrologists. Names of non-rock types and archaic rock types are given as appendices. ==Igneous== (詳細はAndesite - an Intermediate volcanic rock : Alkali feldspar granite - a granitoid in which at least 90% of the total feldspar is in the form of alkali feldspar : Anorthosite - an intrusive igneous felsic rock composed predominantly of plagioclase : Aplite - a very fine grained intrusive igneous rock composed of quartz and feldspar : Basalt - a volcanic rock of mafic composition :: Adakite - a class of basaltic rocks containing low amounts of yttrium and ytterbium :: Hawaiite - a class of basalts formed from ocean island (hot spot) magmatism. : Basanite - a volcanic rock of mafic composition; essentially a silica-undersaturated basalt : Boninite - a magnesium-rich basalt dominated by pyroxene : Carbonatite - a rare igneous rock composed of >50% carbonate minerals : Charnockite - a type of granite containing orthopyroxene :: Enderbite - a variety of charnockite : Dacite - a felsic to intermediate volcanic rock containing hornblende and with plagioclase > orthoclase : Diabase or dolerite - an intrusive mafic rock forming dykes or sills : Diorite - a coarse-grained intermediate plutonic rock composed of plagioclase, pyroxene and/or amphibole : Dunite - a phaneritic ultramafic rock composed of more than 90% olivine, usually forsteritic : Essexite - a silica undersaturated mafic plutonic rock (essentially a foid-bearing gabbro) : Foidolite - a plutonic igneous rock composed of >90% feldspathoid minerals : Gabbro - a coarse grained plutonic rock composed of pyroxene and plagioclase basically equivalent to basalt : Granite - a coarse grained plutonic rock composed of orthoclase, plagioclase and quartz : Granodiorite - a granitic plutonic rock with plagioclase > orthoclase : Granophyre - a subvolcanic intrusive rock of granitic composition : Harzburgite - a variety of peridotite; an ultramafic cumulate rock : Hornblendite - a mafic or ultramafic cumulate rock dominated by >90% hornblende : Hyaloclastite - a volcanic rock composed primarily of glasses and glassy tuff : Icelandite - a volcanic rock : Ignimbrite - a fragmental volcanic rock : Ijolite - a very rare silica-undersaturated plutonic rock : Kimberlite - a rare ultramafic, ultrapotassic volcanic rock and a source of diamonds : Komatiite - an ancient ultramafic volcanic rock with very high MgO content : Lamproite - an ultrapotassic volcanic rock : Lamprophyre - an ultramafic, ultrapotassic intrusive rock dominated by mafic phenocrysts in a feldspar groundmass : Latite - a silica undersaturated form of andesite : Lherzolite - an ultramafic rock, essentially a peridotite : Monzogranite - a silica undersaturated granite with <5% normative quartz : Monzonite - a plutonic rock with <5% normative quartz : Nepheline syenite - a silica undersaturated plutonic rock with nepheline replacing orthoclase : Nephelinite - a silica undersaturated plutonic rock with >90% nepheline : Norite - a hypersthene bearing gabbro : Obsidian - a type of volcanic glass : Pegmatite - an igneous rock (or metamorphic rock) with giant sized crystals : Peridotite - a plutonic or cumulate ultramafic rock composed of olivine and pyroxene : Phonolite - a silica undersaturated volcanic rock; essentially similar to nepheline syenite : Picrite - an olivine-bearing basalt : Porphyry - a rock, usually granitic, with a porphyritic texture : Pumice - a fine grained, extremely vesicular volcanic rock : Pyroxenite - a coarse grained plutonic rock composed of >90% pyroxene : Quartz diorite - a diorite with >5% modal quartz : Quartz monzonite - an intermediate plutonic rock, essentially a monzonite with 5-10% modal quartz : Rhyodacite - a felsic volcanic rock which is intermediate between a rhyolite and a dacite : Rhyolite - a felsic volcanic rock :: Comendite - a peralkaline rhyolite :: Pantellerite - an alkaline rhyolite-rhyodacite with amphibole phenocrysts : Scoria - an extremely vesicular mafic volcanic rock : Sovite - a coarse grained carbonatite rock : Syenite - a plutonic rock dominated by orthoclase feldspar; a type of granitoid : Tachylyte - essentially a basaltic glass : Tephrite - a silica undersaturated volcanic rock : Tonalite - a plagioclase-dominant granitoid : Trachyandesite - an alkaline intermediate volcanic rock :: Benmoreite - sodic trachyandesite :: Basaltic trachyandesite ::: Mugearite - sodic basaltic trachyandesite ::: Shoshonite - potassic basaltic trachyandesite : Trachyte - a silica undersaturated volcanic rock; essentially a feldspathoid-bearing rhyolite : Troctolite - a plutonic ultramafic rock containing olivine, pyroxene and plagioclase : Trondhjemite - a form of tonalite where plagioclase-group feldspar is oligoclase : Tuff - a fine grained volcanic rock formed from volcanic ash : Websterite - a type of pyroxenite, composed of clinoproxene and orthopyroxene : Wehrlite - an ultramafic plutonic or cumulate rock, a type of peridotite, composed of olivine and clinopyroxene 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「List of rock types」の詳細全文を読む スポンサード リンク
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