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Rock that was subjected to heat and pressure
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism. The original rock (protolith)
Metamorphic_rock
rock, metamorphic rock, and sedimentary rock. Adakite – Volcanic rock type Agpaitic rock – Peralkaline igneous rock Andesite – Type of volcanic rock Alkali
List_of_rock_types
Common high-grade metamorphic rock
common and widely distributed type of metamorphic rock. It is formed by high-temperature and high-pressure metamorphic processes acting on formations composed
Gneiss
Naturally occurring mineral aggregate
geological model called the rock cycle. This transformation produces three general classes of rock: igneous, sedimentary and metamorphic. These three classes
Rock_(geology)
Change of minerals in pre-existing rocks without melting into liquid magma
experimental petrology to understand metamorphic processes. Metamorphism is the set of processes by which existing rock is transformed physically or chemically
Metamorphism
Transitional concept of geologic time
rock cycle is a basic concept in geology that describes transitions through geologic time among the three main rock types: sedimentary, metamorphic,
Rock_cycle
Mineral assemblage in metamorphic rocks
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
Metamorphic_facies
Repetitive layering in metamorphic rocks
Foliation in geology refers to repetitive layering in metamorphic rocks. Each layer can be as thin as a sheet of paper, or over a meter in thickness.
Foliation_(geology)
Metamorphic rock
a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through
Slate
Hard, non-foliated metamorphic rock
Quartzite is a hard, non-foliated metamorphic rock that was originally pure quartz sandstone. Sandstone is converted into quartzite through heating and
Quartzite
Rock formed through the cooling and solidification of magma or lava
Igneous rock (igneous from Latin igneus 'fiery'), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous
Igneous_rock
Part of the valley of the North Toe River in North Carolina, US
andesine. Minor minerals include epidote, zoisite, garnet, and sphene. Metamorphic textures in these rocks can either be schistose or gneissic. They transition
Spruce_Pine_Mining_District
Multicoloured metamorphic rock
Unakite is a coarse-grained metamorphic rock that is an altered granitoid composed of orthoclase feldspar (pink), epidote (yellow-green), and quartz (smokey
Unakite
Easily split medium-grained metamorphic rock
medium-grained metamorphic rock generally derived from fine-grained sedimentary rock, like shale. It shows pronounced schistosity (named for the rock). This means
Schist
temperature exceeds that of the initial heating.[citation needed] For metamorphic rocks, there are certain principles for measuring the decrepitations
Decrepitation
Type of metamorphic rock
Marble is a metamorphic rock consisting of carbonate minerals (most commonly calcite (CaCO3) or dolomite (CaMg(CO3)2) that have recrystallized under the
Marble
Metamorphic rock from a sedimentary precursor
metasedimentary rock is a type of metamorphic rock. Such a rock was first formed through the deposition and solidification of sediment. Then, the rock was buried
Metasedimentary_rock
Rock formed by the deposition and cementation of particles
makes way for metamorphism, the process that forms metamorphic rock. The color of a sedimentary rock is often mostly determined by iron, an element with
Sedimentary_rock
Relationship between materials which compose a rock
where interlocking crystals of igneous rock are visible to the unaided eye. Foliated texture is where metamorphic rock is made of layers of materials. Porphyritic
Texture_(geology)
Talc-bearing metamorphic rock
known as steatite or soaprock) is a talc-schist, which is a type of metamorphic rock. It is composed largely of the magnesium-rich mineral talc. It is produced
Soapstone
Geological region of uniform bedrock
composition of a rock equilibrated can vary laterally through a metamorphic terrane. The two parameters together determine the metamorphic grade. The difference
Metamorphic_zone
Rock from which a metamorphic rock is formed
unmetamorphosed rock from which a given metamorphic rock is formed. For example, the protolith of a slate is a shale or mudstone. Metamorphic rocks can be
Protolith
Metamorphic rock type
Amphibolite (/æmˈfɪbəlaɪt/) is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with
Amphibolite
Metamorphic rock
(actinolite). Greenschist is a general field petrologic term for metamorphic or altered mafic volcanic rock. In Europe, the term prasinite is sometimes used. A greenstone
Greenschist
Group of phyllosilicate minerals
cleavage. Mica is common in igneous and metamorphic rock and is occasionally found as small flakes in sedimentary rock. It is particularly prominent in many
Mica
Original rock substratum
develops. It may consist of bedrock (such as sedimentary, igneous, or metamorphic rock) or unconsolidated deposits such as glacial, fluvial, or volcanic sediments
Parent_rock
Chromium variety of muscovite
chromium rich phyllitic or schistose metamorphic rocks of the greenschist facies. Verdite is a type of metamorphic rock made mostly of an impure, often multicolored
Fuchsite
Metamorphic rock containing lazurite, prized for its intense blue color
-ˌlʌɪ/; US: /ˈlæz(j)əli, ˈlæʒə-, -ˌliˌ læˈzuːli/) is a deep-blue metamorphic rock used as a semi-precious stone that has been prized since antiquity
Lapis_lazuli
Geological processes by which rocks are formed
the Earth's crust, changing the composition and fabric to form metamorphic rock. Rock can also form in the absence of a substantial pressure gradient
Formation_of_rocks
Metamorphic rock from a volcanic precursor
tuff as a metatuff. Metavolcanic rock is commonly found in greenstone belts. Metasedimentary rock – Metamorphic rock from a sedimentary precursor Metavolcanic
Metavolcanic_rock
Geological term relating to metamorphic rocks
An isograd is a concept used in the study of metamorphic rocks. The metamorphic grade of such a rock is a rough measure of the degree of metamorphism
Isograd
Topics referred to by the same term
viruses Metamorphic testing, a software testing technique Metamorphic rock, rocks that have been transformed by extreme heat and pressure Metamorphic core
Metamorphic_(disambiguation)
Scottish rock formation
fiddle bow. It is composed of Quartzite, a metamorphic rock which was originally quartz sandstone. This rock is part of the Cullen Quartzite formation
Bow_Fiddle_Rock
Metamorphic rock
Emery, or corundite, is a dark granular rock used to make an abrasive powder. The rock largely consists of corundum (aluminium oxide), mixed with other
Emery_(rock)
Geochronological dating method utilizing the radioactive decay system of lutetium–176
system is now a common tool in geological studies such as igneous and metamorphic rock petrogenesis, early earth mantle-crust differentiation, and provenance
Lutetium–hafnium_dating
Mountain in Chile
that intruded parallel to the sedimentary rock converted the mudstone and sandstone into a dark metamorphic rock. The steep, light colored faces are eroded
Cuernos_del_Paine
Group of rock-forming minerals
and extrusive igneous rocks and are also present in many types of metamorphic rock. Rock formed almost entirely of calcic plagioclase feldspar is known as
Feldspar
Feldspar mineral series
minerals, it is abundant in igneous and metamorphic rock, and it is also common as a detrital mineral in sedimentary rock. It is not a single mineral, but is
Plagioclase
Description of the physical characteristics of a rock unit
naming of a lithology is based on the rock type. The three major rock types are igneous, sedimentary, and metamorphic. Igneous rocks are formed directly
Lithology
Chatoyant gemstone from the quartz family
(also called tiger eye) is a chatoyant gemstone that is usually a metamorphic rock with a golden to red-brown colour and a silky lustre. As members of
Tiger's_eye
Rare metamorphic rock
Nuummite is a rare metamorphic rock that consists of the amphibole minerals gedrite and anthophyllite. It is named after the area of Nuuk in Greenland
Nuummite
Metamorphic rock complex on Santa Catalina Island, California, United States
The Catalina Schist is a metamorphic rock complex primarily exposed on Santa Catalina Island of the Channel Islands of California. It formed during the
Catalina_Schist
production. Slate is a fine-grained metamorphic rock that splits into thin, smooth-surfaced layers. Metamorphic rock is rock which was once igneous or sedimentary
Slate_industry_in_Spain
Tabular intrusion between older layers of rock
older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock. A sill is a concordant intrusive
Sill_(geology)
for an index mineral (a mineral that indicates the approximate metamorphic grade of a rock), were appropriate for these minerals to form. Buchan metamorphism
Metamorphic_series
Type of foliated metamorphic rock
Phyllite (/ˈfɪlaɪt/ FIL-yte) is a type of foliated metamorphic rock formed from slate that is further metamorphosed so that very fine grained white mica
Phyllite
Iron (II) disulfide mineral
associated with other sulfides or oxides in quartz veins, sedimentary rock, and metamorphic rock, as well as in coal beds and as a replacement mineral in fossils
Pyrite
Metamorphic rock
Anyolite is a metamorphic rock composed of intergrown green zoisite, black/dark green pargasite and ruby. It has been found in the Arusha Region of Tanzania
Anyolite
Fine-grained, clastic sedimentary rock
metamorphism alter into a hard, fissile, metamorphic rock known as slate. With continued increase in metamorphic grade the sequence is phyllite, then schist
Shale
Study of rocks in geology
Petrology has three subdivisions: igneous, metamorphic, and sedimentary petrology. Igneous and metamorphic petrology are commonly taught together because
Petrology
Igneous rock with very large interlocked crystals
Pegmatites in low-grade metamorphic rock tend to be dominated by quartz and carbonate minerals. Pegmatites in metamorphic rock of higher grade are dominated
Pegmatite
as marble or hornfels. Goldsmith, Richard (1959). "Granofels, a New Metamorphic Rock Name". The Journal of Geology. 67 (1): 109–110. Bibcode:1959JG....
Granofels
sedimentary, and metamorphic— form spectacular geological features in Hong Kong. Igneous rock forms the hexagonal columns in Sai Kung, sedimentary rock forms various
Geology_of_Hong_Kong
Rock types native to a specific area
The heat of the intrusions usually changes the country rock, often to contact metamorphic rock. Commonly, hornfels is produced, or skarn. When describing
Country_rock_(geology)
Soil type
are generally derived from the weathering of ancient crystalline and metamorphic rock. They are named after their rich red color, varying from reddish brown
Red_soil
Type of igneous rock
such as potassium, and remove others, such as calcium, to transform a metamorphic rock into granite. This was supposed to occur across a migrating front.
Granite
Chemical reaction between minerals within metamorphic rock
final stable state of the observed metamorphic rock. Examples include the production of talc under varied metamorphic conditions: serpentine + carbon dioxide
Metamorphic_reaction
Phyllosilicate mineral in the pyrophyllite-talc group
water, and is slightly soluble in dilute mineral acids. Soapstone is a metamorphic rock composed predominantly of talc. The word talc derives from Persian:
Talc
sculpt their current forms. Metamorphic rocks are created by rocks that have been transformed into another kind of rock, usually by some combination
List_of_rock_formations
Via Ferrata path on the Italian alps
millions of years of tectonic and glacial activity, containing a variety of metamorphic rocks, fault lines, and glacial remnants. The geological heritage of
Bove_Path
Sequence in which minerals form in a deposit
studies of igneous and metamorphic rock genesis and importantly in studies of the hydrothermal deposition of ore minerals and the rock alteration (vein metasomatism)
Paragenesis
equi-granular metamorphic rock texture. Granoblastic texture is typical of quartzite, marble, charnockites and other non-foliated metamorphic rocks without
Granoblastic
Phyllosilicate mineral in the dioctahedral mica group
metamorphic rock or as a secondary mineral resulting from the alteration of topaz, feldspar, kyanite, etc. It is characteristic of peraluminous rock,
Muscovite
Rock created or modified by impact of a meteorite
Impactite is rock created or modified by one or more impacts of a meteorite. Impactites are considered metamorphic rock, because their source materials
Impactite
Species of bivalve mollusc
It has been known to bore into the hard metamorphic rock gneiss, though it more often lives in softer rock. It is a filter feeder, using its siphons
Pholas_dactylus
Pyroxene mineral
emerald green by traces of chromium. Jadeite occurs with albite in metamorphic rock of the low-temperature, high-pressure blueschist facies at destructive
Jadeite
Stone block made of one single piece; object made of one single rock piece
rock, such as some mountains. Erosion usually exposes the geological formations, which are often made of very hard and solid igneous or metamorphic rock
Monolith
Rock formed by transformation of olivine
Serpentinite is a metamorphic rock composed predominantly of serpentine group minerals formed by serpentinization of mafic or ultramafic rocks. The ancient
Serpentinite
Overview of geology of a UK national park
geological science; sill is a local term for a broadly flat-lying body of rock and is now used for igneous intrusions parallel to bedding on a worldwide
Geology of Northumberland National Park
Geology_of_Northumberland_National_Park
Geologic formation in the United States
Highlands. The prong consists of mountains made up of crystalline metamorphic rock. The Reading Prong stretches from near Reading, Pennsylvania, through
Reading_Prong
Chromium-rich variety of mica
refers to the stone in which the green mica is found. This stone is metamorphic rock, containing varying amounts of dolomite and quartz. Larger proportions
Mariposite
Aluminosilicate mineral
blue aluminosilicate mineral, found in aluminium-rich metamorphic pegmatites and sedimentary rock. It is the high pressure polymorph of andalusite and
Kyanite
Foliated metamorphic rock
Khondalite is a foliated metamorphic rock. In India, it is also called Bezwada Gneiss and Kailasa Gneiss. It was named after the Khond tribe of Odisha
Khondalite
Historic site in Ambalavayal
Phantom Rock is a tourist destination in Ambalavayal in the district of Wayanad in Kerala. It is a natural metamorphic rock formation resembling a human
Phantom_Rock
(asbestiform grunerite) Antozonite (variety of fluorite) Anyolite (metamorphic rock - zoisite, ruby, and hornblende) Aquamarine (light blue variety of
List_of_minerals
City in Georgia, United States
a form of metamorphic rock. The Stone Mountain granite is younger than, and has intruded the Lithonia gneiss. The area has a history of rock quarries.
Lithonia,_Georgia
Mixture of metamorphic rock and igneous rock
Migmatite is a rock formed under high-grade metamorphism by partial melting (anatexis), producing a mixture of metamorphic and newly formed igneous material
Migmatite
Color
slight azure tinge, which represents the average color of slate, a metamorphic rock often used in stonemasonry. As a tertiary color, slate is an equal
Slate_gray
Deep blue pigment
historically derived from lazurite, the principal component of the metamorphic rock lapis lazuli. The pigment was produced by grinding the stone and undergoing
Ultramarine
Major mountain range in western North America
the mountains were raised by tectonic forces. The oldest rock is Precambrian metamorphic rock that forms the core of the North American continent. There
Rocky_Mountains
Mountain range in western India
formed by high-grade regional metamorphic processes from preexisting formations that were originally sedimentary rock with earliest life form that were
Aravalli_Range
Mountain in North Carolina, United States
Luther Rock Peak of Mount Jefferson, North Carolina.] Mount Jefferson is part of the Ashe Metamorphic Suite, a large province of metamorphic rock that formed
Mount Jefferson (North Carolina)
Mount_Jefferson_(North_Carolina)
Biblical time period before the flood in the book of Genesis
19th century, rock was classified into three main types: primary or primitive (igneous and metamorphic rock), secondary (sedimentary rock) and tertiary
Antediluvian
phenomena Rock types Igneous rock Igneous formation processes Sedimentary rock Sedimentary formation processes (sedimentation) Quicksand Metamorphic rock Endogenic
List_of_geological_phenomena
Metamorphic rock found in blueschist-grade metamorphic terranes
Jadeitite is a metamorphic rock found in blueschist-grade metamorphic terranes. It is found in isolated metasomatically altered rock units within serpentinite
Jadeitite
Metamorphic rock unit in Canada
Precambrian Research, 281, pp.453-472. King, J. E., 1985. Structure of the Metamorphic Internal Zone, Northern Wopmay Orogen, Northwest Territories, Canada
Acasta_Gneiss
Mountain range in Wisconsin, United States
Geologically, it is a syncline fold consisting of highly eroded Precambrian metamorphic rock. It is about 25 miles (40 km) long and varies from 5 to 10 miles (16 km)
Baraboo_Range
Similarly, metamorphic facies involves the degree of crystallisation and the mineral assemblage in a group of metamorphic rocks. fanning Rock deformation
Glossary_of_geology
phenomena Rock types Igneous rock Igneous formation processes Sedimentary rock Sedimentary formation processes (sedimentation) Quicksand Metamorphic rock Endogenic
List_of_natural_phenomena
Large mineral crystal in a metamorphic rock
A porphyroblast is a large mineral crystal in a metamorphic rock which has grown within the finer grained matrix. Porphyroblasts are commonly euhedral
Porphyroblast
Municipality in Catalonia
halfway between an igneous and metamorphic rock. The area also contains a lot of schist: a medium grade metamorphic rock that has been flattened into sheets
Cadaqués
Rare variety of beryl
transitions. While gem beryls are ordinarily found in pegmatites and certain metamorphic rock, red beryl forms in topaz-bearing rhyolites. It is formed by crystallizing
Red_beryl
Magnesium- and iron-rich extrusive igneous rock
CO2 trap. Intense heat or great pressure transforms basalt into its metamorphic rock equivalents. Depending on the temperature and pressure of metamorphism
Basalt
Town in Maine, United States
composition of this rock layer. Beyond Portland, the layer is a largely metamorphic rock, but here the coast is a mixture of igneous rock, and embayments
Kennebunkport,_Maine
Metamorphic rock formed under high pressure
Eclogite ( /ˈɛklədʒaɪt/) is a metamorphic rock containing garnet (almandine-pyrope) hosted in a matrix of sodium-rich pyroxene (omphacite). Accessory minerals
Eclogite
Depicts coexisting mineral phases in a metamorphic rock
In metamorphic geology, a compatibility diagram shows how the mineral assemblage of a metamorphic rock in thermodynamic equilibrium varies with composition
Compatibility_diagram
Classification of soil or sediment
quartz grains in foliated metamorphic rock, or arise from authigenic growth of quartz grains parallel to bedding in sedimentary rock. Theoretically, particles
Silt
thick layers of limestone were laid down over the old igneous and metamorphic rock. In many places, the limestone is thousands of feet[specify] thick
Geography_of_Jamaica
Ridge of erosion-resistant rock in South Africa
in South Africa. It consists of a hard, erosion-resistant quartzite metamorphic rock, over which several north-flowing rivers form waterfalls, which account
Witwatersrand
Member of the clinopyroxene group of silicate minerals
clinopyroxene. It normally appears in eclogite, which is the high-pressure metamorphic rock of basalt. Omphacite is the solid solution of Fe-bearing diopside and
Omphacite
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