Metamorphic facies

faciesgreenschist faciesamphibolite faciesblueschist facieseclogitegranulite faciesintermediate pressureslow grade metamorphicmarginal faciesmetamorphic mineral assemblages
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures.wikipedia
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Metamorphic rock

metamorphicmetamorphosedmetamorphic rocks
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures.
They are classified by texture and by chemical and mineral assemblage (metamorphic facies).

Pentti Eskola

Pentti Eelis Eskola
Analogous with these sedimentary facies a number of metamorphic facies were proposed in 1920 by Finnish petrologist Pentti Eskola.
Pentti Eelis Eskola (8 January 1883 – 6 December 1964) was a Finnish geologist who developed the concept of metamorphic facies.

Francis John Turner

Eskola's classification was refined by New-Zealand geologist Francis John Turner throughout his career.
His application and expansion of Pentti Eskola's concept of metamorphic facies led to his publication of Mineralogical and Structural Evolution of Metamorphic Rocks, the book that established his position in the field of petrology and was a great influence on a generation of geologists.

Ultra-high-temperature metamorphism

ultra-high temperature metamorphic eventultra-high temperature (UHT) metamorphicUltrahigh-temperature metamorphism
See: Ultra-high-temperature metamorphism
Granulite-facies rocks metamorphosed at very high temperatures were identified in the early 1980s, although it took another decade for the geoscience community to recognize UHT metamorphism as a common regional phenomenon.

Stilpnomelane

*albite + quartz + epidote + muscovite ± stilpnomelane
It is a metamorphic mineral associated with the blueschist and greenschist facies.

Albite

albitisationAbalbitic
It is named for the two minerals albite and epidote, though they are also stable in other facies.
It occurs in granitic and pegmatite masses (often as the variety Cleavelandite), in some hydrothermal vein deposits, and forms part of the typical greenschist metamorphic facies for rocks of originally basaltic composition.

Amphibolite

amphibolite faciesmetabasaltepidiorite
The amphibolite facies is a facies of medium pressure and average to high temperature.
In dry rocks, however, additional heat (and burial) may result in granulite facies conditions.

Eclogite

eclogite facieseclogiticEclogites
It is named for the metabasic rock eclogite.
Eclogite facies is determined by the temperatures and pressures required to metamorphose basaltic rocks to an eclogite assemblage.

Glaucophane

ferro-glaucophane
The facies is named after the schistose character of the rocks and the blue minerals glaucophane and lawsonite.
The blueschist metamorphic facies gets its name from abundant blue minerals glaucophane and lawsonite.

Metamorphism

metamorphosedmetamorphiccontact metamorphism
The zeolite facies is the metamorphic facies with the lowest metamorphic grade.
Regional metamorphism can be described and classified into metamorphic facies or metamorphic zones of temperature/pressure conditions throughout the orogenic terrane.

Anorthite

Ananorthositic plagioclase
It also occurs in metamorphic rocks of granulite facies, in metamorphosed carbonate rocks, and corundum deposits.

Granulite

granulite faciesleptynitegranulitic
The granulite facies is the highest grade of metamorphism at medium pressure.

Lawsonite

The facies is named after the schistose character of the rocks and the blue minerals glaucophane and lawsonite.
Glaucophane, kyanite and zoisite are other common minerals in the blueschist facies and are commonly found to coexist (Pawley et al., 1996).

Mineral

mineralsmineral depositsaccessory mineral
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures.

Pressure

water pressurenegative pressurefluid pressure
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures.

Temperature

temperaturesair temperaturewarm
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures.

Tectonics

tectonictectonicallytectonism
Rocks which contain certain minerals can therefore be linked to certain tectonic settings, times and places in the geological history of the area.

Diagenesis

diageneticdiageneticallylithified
The area on the graph corresponding to rock formation at the lowest values of temperature and pressure is the range of formation of sedimentary rocks, as opposed to metamorphic rocks, in a process called diagenesis.

Depositional environment

environmentsedimentary depositional environmentsedimentary environment
The name facies was first used for specific sedimentary environments in sedimentary rocks by Swiss geologist Amanz Gressly in 1838.

Sedimentary rock

sedimentarysedimentary rockssediments
The area on the graph corresponding to rock formation at the lowest values of temperature and pressure is the range of formation of sedimentary rocks, as opposed to metamorphic rocks, in a process called diagenesis. The name facies was first used for specific sedimentary environments in sedimentary rocks by Swiss geologist Amanz Gressly in 1838.

Switzerland

SwissSwiss ConfederationSWI
The name facies was first used for specific sedimentary environments in sedimentary rocks by Swiss geologist Amanz Gressly in 1838.

Amanz Gressly

Gressli
The name facies was first used for specific sedimentary environments in sedimentary rocks by Swiss geologist Amanz Gressly in 1838.

Facies

sedimentary facieslithofaciesbiofacies
Analogous with these sedimentary facies a number of metamorphic facies were proposed in 1920 by Finnish petrologist Pentti Eskola.

Finland

FinnishFINRepublic of Finland
Analogous with these sedimentary facies a number of metamorphic facies were proposed in 1920 by Finnish petrologist Pentti Eskola.