List of rock types – simple english wikipedia, the free encyclopedia q gases componen el aire


Sorted by name; initial letter means Igneous, Sedimentary or Metamorphic rocks. A [ change | change source ] I Andesite – an intermediate volcanic rock M Anthracite – a form of hard coal B [ change | change source ] S Banded iron formation – a fine grained chemical sedimentary rock composed of iron oxide minerals S Bauxite – the main ore of aluminium. It is mostly aluminium oxide. I Basalt – grey/black fine-grained rock from lava which cooled on the surface of the Earth. S Blue Lias – a formation of rocks, part of the Jurassic Coast World Heritage Site. S Breccia – a sedimentary or tectonic rock composed of fragments of other, broken rocks C [ change | change source ] S Chalk – a fine grained carbonate rock composed mainly of coccoliths S Chert – a fine grained chemical sedimentary rock composed of silica S Clastic rock – composed of fragments, or clasts, of pre-existing rock. S Claystone – a sedimentary rock formed from clay S Coal – a sedimentary rock formed from peat S Concretion – a concretion is a rock in which a mineral cement fills the spaces between the sediment grains. S Conglomerate – a sedimentary rock composed of large rounded fragments of other rocks S Coquina – a sedimentary carbonate rock formed by accumulation of abundant shell fossils and fragments D [ change | change source ] I Dacite – a felsic to intermediate volcanic rock with high iron content S Diatomite – a sedimentary rock fromed from diatom fossils I Diorite – a coarse grained intermediate plutonic rock S Dolomite – a carbonate rock composed of calcium magnesium carbonate: CaMg(CO 3) 2 I Dunite – a rock made mostly of olivine E [ change | change source ] Evaporite – a chemical sedimentary rock formed by accumulation of minerals after evaporation F [ change | change source ] S Flint – a form of chert I Foidolite – a plutonic igneous rock composed of >90% feldspathoid minerals G [ change | change source ] I Gabbro – a coarse grained plutonic rock chemically equivalent to basalt. Plutonic = magma cooled below surface of the Earth. M I Granite – a coarse grained plutonic rock composed of orthoclase, plagioclase and quartz M Granulite – a high grade metamorphic rock formed from basalt; also a facies of metamorphic rocks M Greenschist – a generic term for a mafic metamorphic rock dominated by green amphiboles S Greenstone – greenish sandstone; and a geologic formation in Great Britain S Greywacke – an immature sandstone with quartz, feldspar and rock fragments within a clay matrix S Gritstone – a coarse sandstone formed from small pebbles H [ change | change source ] I Horneblendite – a mafic or ultramafic cumulate rock dominated by >90% hornblende M Hornfels – a metamorphic rock formed by heating by an igneous rock I [ change | change source ] I Ignimbrite – a fragmental volcanic rock K [ change | change source ] I Kimberlite – a rare ultra mafic, ultrapotassic volcanic rock and a source of diamonds L [ change | change source ] S Lignite – brown coal S Limestone – a sedimentary rock composed primarily of carbonate minerals M [ change | change source ] M Marble – a metamorphosed limestone S Marl (geology) – a limestone with a considerable proportion of silicate material M Migmatite – a high grade metamorphic rock verging upon melting into a magma S Mudrock – a sedimentary rock composed of clay and muds S Mudstone – a type of mudrock N [ change | change source ] I Nephelinite – a silica undersaturated plutonic rock with >90% nepheline O [ change | change source ] I Obsidian – volcanic glass S Woolite – a chemical sedimentary limestone (formed by precipitation) P [ change | change source ] I Pegmatite – an igneous rock (or metamorphic rock) with giant sized crystals I Peridotite – a plutonic or cumulate ultra mafic rock composed of >90% olivine M Phyllite – a low grade metamorphic rock composed mostly of micaceous minerals I Plutonic rocks – intrusive rocks that crystallized from magma slowly cooling below the surface of the Earth. I Pumice – a fine grained volcanic rock with gas bubbles inside I Pyroclastic rocks – rocks of volcanic origin Q [ change | change source ] M Quartzite – a metamorphosed sandstone typically composed of >95% quartz R [ change | change source ] I Rhyolite – a felsic volcanic S [ change | change source ] S Sandstone – a clastic sedimentary rock defined by its grain size M Schist – a low to medium grade metamorphic rock M Serpentinite – a metamorphosed ultramafic rock dominated by serpentine minerals S Shale – a clastic sedimentary rock defined by its grain size S Siltstone – a clastic sedimentary rock defined by its grain size M Skarn – calcium-bearing silicate rocks of any age: a metasomatic rock M Slate – a low grade metamorphic rock formed from shale or silts M Steatite – Steatite or soapstone is a metamorphic rock. It has a large amount of the mineral talc. I Syenite – a plutonic rock dominated by orthoclase feldspar; a type of granitoivolcanic rock; can be a generic term I Tonalite – a plagioclase-dominant granitoid S Travertine – a carbonate precipitate from hot-springs. S Tufa – a porous carbonate precipitate from ambient-temperature water I Tuff – a fine grained volcanic rock formed from volcanic ash V [ change | change source ] I Variolite W [ change | change source ] S Wackestone – a matrix-supported carbonate sedimentary rock Related pages [ change | change source ]