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Subgroup of phyllosilicate minerals within the trioctahedral mica group
Biotite is a common group of phyllosilicate minerals within the mica group, with the approximate chemical formula K(Mg,Fe)3AlSi3O10(F,OH)2. It is primarily
Biotite
Type of igneous rock
somewhat equigranular matrix of feldspar and quartz with scattered darker biotite mica and amphibole (often hornblende) peppering the lighter color minerals
Granite
Garnet-biotite geothermometry is a method used to evaluate the peak temperature at which metamorphic rocks have formed. Geothermometry makes up one component
Garnet-biotite_geothermometry
Common high-grade metamorphic rock
also be named after a characteristic component such as garnet gneiss, biotite gneiss, albite gneiss, and so forth. Orthogneiss designates a gneiss derived
Gneiss
Type of coarse grained intrusive igneous rock
mineral components. Amphiboles (often in the form of hornblende), and biotite are more abundant in granodiorite than in granite, giving it a more distinct
Granodiorite
Igneous rock
feldspar-plagioclase-feldspathoid (QAPF) content of the rock. Amphiboles and biotite are common in lesser quantities, while accessory minerals include apatite
Tonalite
Hydrous phyllosilicate mineral
effect. Vermiculite forms by the weathering or hydrothermal alteration of biotite or phlogopite. Large commercial vermiculite mines exist in the United States
Vermiculite
Group of metamorphic rocks
Clays, sedimentary slates and shales yield biotite hornfels in which the most conspicuous mineral is biotite mica, the small scales of which are transparent
Hornfels
Igneous rock
mafic minerals, when present, are magnetite and an iron-rich variety of biotite (lepidomelane). The rock was named after its occurrence at Litchfield,
Litchfieldite
Mica mineral in the biotite subgroup
known as magnesium mica. Phlogopite is the magnesium endmember of the biotite solid solution series, with the chemical formula KMg3AlSi3O10(F,OH)2. Iron
Phlogopite
Rock consolidated from volcanic ash
pumiceous, glassy fragments and small scoriae with quartz, alkali feldspar, biotite, etc. Iceland, Lipari, Hungary, the Basin and Range of the American southwest
Tuff
Uncommon plutonic rock type
plagioclase and amphibole accompanied by lesser amounts of clinopyroxene, biotite and magnetite. The core of the orbicules is polycrystalline and corresponds
Orbicular_granite
diorite gneiss. Rock types include gneissic biotite-quartz diorite, hornblende-biotite-quartz diorite, and biotite granodiorite, with minor amounts of quartz
Port_Deposit_Gneiss
Holocrystalline plutonic rock
Other minerals common in minor amounts include sodium-rich pyroxene, biotite, titanite, iron oxides, apatite, fluorite, melanite garnet, and zircon
Nepheline_syenite
World's most recent supereruption, of Taupō Volcano, New Zealand
initial two phases of the eruption having contributions from a leak of biotite-bearing rhyolite, presumably along dykes at more than 2 km (1.2 mi) depth
Oruanui_eruption
Science that applies chemistry to analyze geological systems
crystals of hornblende and biotite may be found in great numbers partially converted into augite and magnetite. Hornblende and biotite were stable under the
Geochemistry
Volcanic rock intermediate in composition between andesite and rhyolite
(rhyolites). Dacite consists mostly of plagioclase feldspar and quartz with biotite, hornblende, and pyroxene (augite or enstatite). The quartz appears as
Dacite
Group of phyllosilicate minerals
brittle mica. Muscovite Paragonite Brittle micas: Margarite Common micas: Biotite Lepidolite Phlogopite Zinnwaldite Brittle micas: Clintonite Very fine-grained
Mica
Metamorphic rock type
hornblende/actinolite +/- albite +/- biotite +/- quartz +/- garnet (calcite +/- wollastonite) Pelite; quartz, orthoclase +/- albite, +/- biotite +/- actinolite +/- garnet
Amphibolite
Type of ultrapotassic igneous rock
igneous rocks which have primary mineralogy consisting of amphibole or biotite, and with feldspar in the groundmass. Lamprophyres are not amenable to
Lamprophyre
Tendency of crystalline materials to split along favored planes
only one cleavage plane. Talc has basal cleavage. Mica (like muscovite or biotite) also has basal cleavage; this is why mica can be peeled into thin sheets
Cleavage_(crystal)
Rock's chemical alteration geological process
rock, caused by iron and magnesium bearing hydrothermal fluids, altering biotite or amphibole within the rock groundmass. It typically results in epidote–chlorite–albite
Propylitic_alteration
Igneous, volcanic rock, of felsic (silica-rich) composition
Cristobalite and trydimite are sometimes present along with the quartz. Biotite, augite, fayalite, and hornblende are common accessory minerals. Due to
Rhyolite
Group of phyllosilicate minerals
as a secondary mineral, formed by alteration of mafic minerals such as biotite, hornblende, pyroxene, or garnet. The glassy rims of pillow basalt on the
Chlorite_group
Easily split medium-grained metamorphic rock
constituent minerals will be included in the rock name, such as quartz-felspar-biotite schist. Schist bedrock can pose a challenge for civil engineering because
Schist
Earth's highest mountain
Formation consists chiefly of biotite-quartz phyllite and chlorite-biotite phyllite intercalated with minor amounts of biotite-sericite-quartz schist. Between
Mount_Everest
Biotite granite rocks that are considered to be the final fractionation product of magma
along the Vigo–Régua shear zone, the monzogranites belong to the syn-F3 biotite granitoid group. They include large crystals of potassium feldspar and
Monzogranite
Iron-rich end member of the chlorite group
a product of the hydrothermal alteration of pyroxenes, amphiboles and biotite in igneous rock. The composition of chlorite is often related to that of
Chamosite
Metamorphic rock
Lake Formation in Minnesota Composition Primary quartz, muscovite/illite Secondary biotite, chlorite, hematite, pyrite Specific gravity: 2.7 – 2.8, 2.9
Slate
Silicate mineral or igneous rock that is rich in magnesium and iron
rock-forming mafic minerals include olivine, pyroxene, amphibole, and biotite. Common mafic rocks include basalt, diabase and gabbro. Mafic rocks often
Mafic
include biotite (and the magnesium end-member phlogopite) and muscovite. Smith College - Geology 222b - Petrology - Petrographic Data File - Biotite Archived
Bird's_eye_extinction
Igneous rock rich in feldspathoid minerals
minerals are feldspathoids. Crystals of alkali feldspar, plagioclase, biotite, amphibole, pyroxene, and/or olivine may be present within the rock. The
Foidolite
Class of high-grade medium to coarse grained metamorphic rocks
kinds of mica (muscovite and biotite) occur, and corresponds to the German Granit, or to the English muscovite biotite granite. This application has
Granulite
State park in North Carolina, United States
Ordovician-Silurian, biotite-granite-gneiss. The Henderson Gneiss is a medium- to coarse-grained, typically well-foliated, biotite-microcline augen gneiss
Chimney_Rock_State_Park
Phyllosilicate mineral in the dioctahedral mica group
in color and its cleavage sheets are inelastic. The other common mica, biotite, is almost always much darker in color than muscovite. Paragonite can be
Muscovite
Geological phenomenon
spherical shell of discolouration (pleochroism) within minerals such as biotite that occurs in granite and other igneous rocks. The halo is a zone of radiation
Pleochroic_halo
Subgroup of phyllosilicate minerals within the kaolinite-serpentine group
Micas Aluminoceladonite Anandite Annite Aspidolite Balestraite Bityite Biotite Boromuscovite Bramallite Celadonite Chernykhite Chromphyllite Clintonite
Serpentine_subgroup
former consists of orthoclase, nepheline, sodalite, diopside and aegirine, biotite and sphene. Two occurrences are known, one in Arkansas, the other in Sutherland
Leucitite
Michel J.; Lira, Raul; Chen, Yadong; Tingey, David (1997). "Origin of biotite-apatite-rich enclaves, Achala batholith, Argentina". Contributions to Mineralogy
Enclave_(geology)
Type of igneous rock
composition, andesine to oligoclase. Quartz is present in significant amounts. Biotite and/or hornblende constitute the dark minerals. Because of its coloring
Quartz_monzonite
Mineral assemblage in metamorphic rocks
plagioclase ± epidote, garnet, cummingtonite, diopside, biotite In metapelites: muscovite + biotite + quartz + plagioclase ± garnet, staurolite, kyanite/sillimanite
Metamorphic_facies
Any polyatomic anion containing silicon and oxygen
strong cleavage plane. Micas fall into this group. Both muscovite and biotite have very weak layers that can be peeled off in sheets. In a framework
Silicate
Oldest-surviving crustal material from the Hadean eon
that are consistent with their forming in "I-type" (hornblende, quartz, biotite, plagioclase, apatite, ilmenite) and "S-type" (quartz, K-feldspar, muscovite
Hadean_zircon
Tehsil in Palakkad district
hornblende gneiss, migmatitic amphibolite, quartz biotite gneiss, quartz-feldspathic gneiss, biotite granite gneiss, and pegmatite. Among the rock types
Attappadi_taluk
Phyllosilicate mineral in the pyrophyllite-talc group
Micas Aluminoceladonite Anandite Annite Aspidolite Balestraite Bityite Biotite Boromuscovite Bramallite Celadonite Chernykhite Chromphyllite Clintonite
Talc
Optical phenomenon
dark brown / light brown Zircon (very weak): brown-red / brown-yellow Biotite (medium): brown Alexandrite (strong): dark red / orange / green Andalusite
Pleochroism
Order of crystallization of minerals in magma
minerals) High (1200°C) Olivine Plagioclase (Calcium rich) Pyroxene Amphibole Biotite (Black Mica) Plagioclase (Sodium rich) Relative Crystallization Temperature
Bowen's_reaction_series
sediments and are common in biotite. It contains quartz and microcline feldspar and brown biotite and also muscovite. It has more biotite and plagioclase than
Geology of the Australian Capital Territory
Geology_of_the_Australian_Capital_Territory
chlorite, muscovite, albite Biotite zone: quartz, muscovite, biotite, chlorite, albite Garnet zone: quartz, muscovite, biotite, garnet, sodic plagioclase
Index_mineral
Igneous rock
medium-to-coarse-grained calcite rock with variable accessory amphibole, biotite, pyrite, pyrochlore and fluorite. Panda Hill Carbonatite Kresten, Peter;
Sovite
Type of volcanic rock
olivine phenocrysts. It contains minor amounts of plagioclase and accessory biotite, apatite, and iron oxides. Its type locality is Ankaramy in Madagascar
Ankaramite
Phyllosilicate mineral series in the trioctahedral mica group
belongs to the group of trioctahedral micas, with a structure resembling biotite. This structure is sometimes described as TOT-c. The crystal consists of
Lepidolite
monzonite Monzogabbro – Type of intrusive igneous rock Monzogranite – Biotite granite rocks that are considered to be the final fractionation product
List_of_rock_types
to melt (see Bowen's reaction series). Typical minerals are amphibole, biotite, pyroxene, ilmenite or other iron oxides and some plagioclase feldspar
Restite
Historic mountain in Kashihara, Japan
mountain are gneiss new rocks, and part of the middle slope and higher are biotite and andesite. At the top is a funnel of an extinct crater.
Mount_Unebi
Chemical alteration of a rock by hydrothermal and other fluids
deposits, results in production of micaceous, potassic minerals such as biotite in iron-rich rocks, muscovite mica or sericite in felsic rocks, and orthoclase
Metasomatism
Visible shape of a mineral
group Foliated/Micaceous/Lamellar Molybdenite Biotite Layered crystal planes, parting into thin sheets biotite, hematite, muscovite, lepidolite, molybdenite
Crystal_habit
Aluminosilicate mineral
of silicate minerals. Kyanite Andalusite Sillimanite Kyanite occurs in biotite gneiss, mica schist, and hornfels, which are metamorphic rocks formed at
Kyanite
Rock-forming minerals with predominantly silicate anions
Al)2(AlSi3O10)(OH)2 Trioctahedral mica group Aspidolite – NaMg3(AlSi3O10)(OH)2 Biotite subgroup – K(Fe2+,Mg)2(Al,Fe3+,Mg,Ti)([Si,Al,Fe]2Si2O10)(OH,F)2 Annite
Silicate_mineral
lower than the combination. Examples of peraluminous minerals include biotite, muscovite, cordierite, andalusite and garnet. Peraluminous corresponds
Peraluminous_rock
Type of igneous rock
variety of plagioclase). Common mineral components include hornblende and biotite. The name has come to be used most frequently as a textural term where
Rapakivi_granite
Mica mineral in the biotite subgroup
chemical formula of KFe32+AlSi3O10(OH)2. Annite is the iron end member of the biotite mica group, the iron rich analogue of magnesium rich phlogopite. Annite
Annite
Mountain monument under construction in South Dakota
(myrmekitic), and muscovite. Accessory minerals including tourmaline, biotite, beryl, garnet, and apatite. The average whole-rock geochemistry is as
Crazy_Horse_Memorial
composed of quartz, feldspar, and mica. The mica is both muscovite and biotite." It intrudes into the Waits River Formation. The granite is mined at the
Barre_granite
Gemstone: beryllium aluminium silicate
found in association with quartz, potassium feldspar, albite, muscovite, biotite, and tourmaline. Beryl is sometimes found in metasomatic contacts of igneous
Beryl
Complex inosilicate series of minerals
angles. Hornblende is most often confused with the pyroxene series and biotite mica, which are also dark minerals found in granite and charnockite. Pyroxenes
Hornblende
City in Gyeonggi, South Korea
constituent minerals are quartz, plagioclase, orthotic, biotite, and amphibole. Precambrian biotite gneiss (PCEbgn) is found in northern Suwon, specifically
Suwon
Radiometric dating technique for rocks and minerals
Typically, Rb/Sr increases in the order plagioclase, hornblende, K-feldspar, biotite, muscovite. Therefore, given sufficient time for significant production
Rubidium–strontium_dating
Batholith in Idaho and Montana, United States
made almost entirely of preexisting continental material and contains biotite-containing granodiorite and two-mica granite. However, the early metaluminous
Idaho_Batholith
Mountain in Yavapai County, Arizona, United States
the Williamson Valley. Granite Mountain is composed of Paleoproterozoic biotite granodiorite to granite that is known by geologist as the Mint Wash Granodiorite
Granite_Mountain_(Arizona)
Volcanic rock
Volcanic glass Secondary Alkali feldspar, plagioclaise feldspar, quartz, biotite, sanidine, zircon, magnetite and hornblende Texture Vesicular with matrix
Pumice
Cyclosilicate, mineral
microcline, and spodumene in granite pegmatites; with andalusite and biotite in schist; and with molybdenite and cassiterite in massive hydrothermal
Elbaite
Town in Australian Capital Territory
on Tharwa Adamellite. This adamellite is coarsely foliated and contains biotite mica. It has been dated at 423 ±6 million years old. This places it in
Tharwa, Australian Capital Territory
Tharwa,_Australian_Capital_Territory
Dam on the Gunnison River in Colorado
metamorphic rocks, primarily micaceous quartzite, quartz-mica, mica and biotite schists, with granitic veining. The dam site is in a narrow canyon about
Morrow_Point_Dam
Wilderness area in Nova Scotia, Canada
Goldenville Formation, the Halifax Formation, and Middle to Late Devonian biotite monzogranite and leucomonzogranite. Wildlife includes eastern moose and
Tobeatic_Wilderness_Area
Korean Loess - Hwangto, the soil of life (Fertile Earth) 무안 황토
rocks were quartz, biotite, chlorite, and plagioclase. The mineralogy of the sand fraction of the residual soil was quartz, biotite, muscovite and sanidine
Hwangto
Type of igneous rock
and ilmenite (2%). Accessory and alteration minerals include hornblende, biotite, apatite, pyrrhotite, chalcopyrite, serpentine, chlorite, and calcite.
Diabase
Type of volcanic rock
augite, pigeonite, or orthopyroxene. Magnetite, zircon, apatite, ilmenite, biotite, and garnet are common accessory minerals. Alkali feldspar may be present
Andesite
History of rock pressure and temperature
geothermometers is the garnet-biotite relationship where the relative proportions of iron and magnesium in garnet and biotite change with increasing temperature
Geothermobarometry
Lake in the South Island of New Zealand
years old, medium grained, white, granodiorite and granite, with red-brown biotite. It has intruded dikes, plugs and xenoliths into metasediment. Albert Edward
Lake_Hauroko
Mountain in Rappahannock County, Virginia
Igneous Suite. This includes felsic complex material such as biotite, hornblende-biotite, magnetite, and alkali granitic rock including rhyolite on the
Battle_Mountain_(Virginia)
Sedimentary rocks made of mineral or rock fragments
are generally heavy minerals or coarse grained micas (both muscovite and biotite). Rock fragments also occur in the composition of siliciclastic sedimentary
Clastic_rock
Natural process occurring on minerals
pleochroic halos surrounding minute zircon inclusions within a crystal of biotite or other mineral. The spherical halos are produced by alpha particle radiation
Metamictisation
German mineralogist (1782-1859)
he described the mineral allophane. In 1847 he coined the mineral name biotite in honor of physicist Jean Baptiste Biot. He is also credited with coining
Johann Friedrich Ludwig Hausmann
Johann_Friedrich_Ludwig_Hausmann
Local Government Area in Kaduna State, Nigeria
predominantly metamorphic rocks of the Nigerian basement complex consisting of biotite gneisses and older granites (Kaduna State, 2003). The topographical relief
Kaduna_North
Subclass of granite formed from igneous protoliths
feldspar scarcely show granophyric textures. Biotite is the most common minor mineral in I-type granites. The biotites in I-type granites are greener in general
I-type_granite
Igneous rock
plagioclase (labradorite), and nepheline, along with accessories including biotite, magnetite, ilmenite and analcime. Theralite is the intrusive equivalent
Theralite
Type of granite rock
colour. Quartz (26 percent). Plagioclase (20 percent) Muscovite (5 percent) Biotite (5 percent) and leads to the distinct structured texture. Apatite (below
Forbach_Granite
Deterioration of rocks and minerals through exposure to the elements
systems can release inorganic nutrients from minerals such as apatite or biotite and transfer these nutrients to the trees, thus contributing to tree nutrition
Weathering
Carbonatite complex in Finland
The main minerals are plagioclase feldspar, quartz, microcline feldspar, biotite, and hornblende. The surrounding granite gneiss extends some 100 km to
Siilinjärvi_carbonatite
belt are pelite or various types of volcanic rock. Gneiss, hornblende, biotite, garnet and kyanite are common in the belt. Northwestern Tanzania has the
Geology_of_Tanzania
Mountain range in Washington, United States
open terrain. Many of the peaks are challenging rock climbs. The rock is biotite gneiss, formed by metamorphism of sedimentary and volcanic rocks about
Picket_Range
Intrusive igneous rock
composed of 45–55% alkali feldspar, 15–20% plagioclase, 15–20% quartz, 5–8% biotite, 3–5% hornblende, and accessory magnetite (Evans and Green, 2003). Syenogranite
Syenogranite
the Pleistocene epoch. Around Mount Job, rhyodacite contains hornblende, biotite and quartz. On the east side of the Affliction Glacier, rhyodacite of the
Job_Assemblage
Phyllosilicate mineral in the dioctahedral mica group
Micas Aluminoceladonite Anandite Annite Aspidolite Balestraite Bityite Biotite Boromuscovite Bramallite Celadonite Chernykhite Chromphyllite Clintonite
Roscoelite
Igneous rock
Glimmerite is an igneous rock consisting almost entirely of dark mica (biotite or phlogopite). Glimmerite has also been referred to as biotitite, though
Glimmerite
Region of rock features in Colombia
its existence. The batholith varies in composition between hornblende-biotite tonalite to granodiorite, with lateral variations between gabbro to granite
Antioquia_Batholith
Mountain in Colorado, United States
Summer Mountains Topo map USGS Mount Richthofen Geology Rock age Proterozoic Rock type(s) Biotite, Gneiss Climbing Easiest route class 2 Southeast slope
Green_Knoll
Rock formed from lava erupted from a volcano
corroded at some period before the matrix solidified. Corroded phenocrysts of biotite and hornblende are very common in some lavas; they are surrounded by black
Volcanic_rock
Mountain range in Missouri, U.S.
and amphibole - biotite granite. They are commonly porphyritic. The central plutons are highly evolved two-mica (contain both biotite and muscovite) granites
St._Francois_Mountains
BIOTITE
BIOTITE
BIOTITE
BIOTITE
Boy/Male
Indian, Telugu
Lord Ram
Girl/Female
British, English
Bright Fame
Boy/Male
Tamil
Hetvik | ஹேதà¯à®µà®¿à®•Â
Boy/Male
Arabic, Australian
Peaceful
Girl/Female
Indian, Tamil
Goddess Parvati
Female
Greek
(ΤυÏÏŽ) Greek name TYRO means "like cheese." In mythology, this is the name of a Thessalian princess who was the mother of Nileas (Latin Neleus).
Male
Scottish
Variant spelling of Scottish Gaelic Alastair, ALASTEIR means "defender of mankind."
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Kamdev; Cupid
Boy/Male
Celtic Gaelic Irish
noble.
Girl/Female
Latin American
From Adria, the Adriatic sea region. Also means dark.
BIOTITE
BIOTITE
BIOTITE
BIOTITE
BIOTITE
n.
A dark green igneous rock, consisting largely of chrysolite, with hornblende, augite, biotite, etc.
n.
A granitoid rock containing feldspar, biotite, elaeolite, and sodalite.
n.
Mica containing iron and magnesia, generally of a black or dark green color; -- a common constituent of crystalline rocks. See Mica.