Metamorphic rocks started out as some other type of rock, but have been substantially changed from their original igneous, sedimentary, or earlier metamorphic form. See our Privacy Policy and User Agreement for details. younger than 450 Ma (million years old)) occur in fold mountain belts which are produced by tectonic processes associated with the development of these belts. A thorough presentation on characteristics and description of all main types of metamorphic rocks. Rocks that undergo a change to form a new rock are referred to as metamorphic rocks. • Replacement Textures and Reaction It occurs particularly in soda rich basaltic rocks known as spillites. The four main agents that metamorphose rocks are heat, pressure, fluids, and strain. These changes occur by processes of: See our User Agreement and Privacy Policy. 5. Low-grade metamorphism takes place at temperatures between about 200 to 320 o C, and relatively low pressure. PILLOW STRUCTURE: In this structure, the volcanic igneous body appears as a pile of numerous overlapping pillows or sacks. The preexisting rocks may be igneous, sedimentary, or other metamorphic rocks. Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". • Restate how metamorphic rocks relate to the two other rock groups (sedimentary and igneous). This structure is best described as (a) Cross bedding (b) Graded bedding (c) Bioturbation 21a. Foliated metamorphic rocks. The following article is from The Great Soviet Encyclopedia (1979). b. Phyllite. Saved by oakdome.com. Such features include folds, nappes, and faults with a wide variety of geometries. Metamorphic rock - Metamorphic rock - Pressure: The pressure experienced by a rock during metamorphism is due primarily to the weight of the overlying rocks (i.e., lithostatic pressure) and is generally reported in units of bars or kilobars. metamorphic rocks from central Australia. Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich … Schist: a metamorphic rock exhibiting a schistosity. Upcoming SlideShare. More information... People also love these ideas Metamorphic rocks can be formed from igneous, sedimentary, or previous- ... or planar, structure, resulting from recrystallization. This video is unavailable. • Recognize the different types of metamorphism, the processes that cause them, and the environments in which they occur. Structures in Metamorphic Rocks: The structures of the metamorphic rocks are: (i) Slaty structure, (ii) Schistose structure, (iii) Gneissose structure, and (iv) Granulose structure. Was this structure (in Figure C) formed by (a) asymmetrical or (b) symmetrical ripples? • High Strain Metamorphic Textures Metamorphic rocks are the third great class of rocks. Cataclastic - Hornfelsic - Granoblastic - Schistose Each of these will be discussed in turn, then we will summarize how metamorphic rocks are classified. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. 3. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Metamorphic rocks are the third great class of rocks. Classification of metamorphic rocks is based on mineral assemblage, texture, protolith, and bulk chemical composition of the rock. • Describe how metamorphic rocks are produced by the action of heat, pressure, and fluids on preexisting parent rocks over the course of time. • Describe how metamorphic rocks are produced by the action of heat, pressure, and fluids on preexisting parent rocks over the course of time. Notes on rocks from class. Metamorphic rocks and processes • Metamorphism comes from the Greek words “Meta” - change “Morphe” - form • Metamorphic rocks form by solid-state (no melting) transformation of preexisting rock by processes that take place beneath Earth’s surface. (i) Slaty structure: The slaty structure is also called slaty cleavage. Metamorphic rocks are characterised by the complete absence of fossils, because fossils embedded in the sedimentary rocks are destroyed by intense heat and pressure. The four main agents that metamorphose rocks are heat, pressure, fluids, and strain. K5 Technology Lab. sc geology course structure and. This heat engine drives plate tectonics, or the movements of large segments of the earth's crust (plates) that are separated along deep cracks called faults. Common Metamorphic Rocks: Common metamorphic rocks include phyllite, schist, gneiss, quartzite and marble. If you continue browsing the site, you agree to the use of cookies on this website. Even rocks, a seemingly constant substance, can change into a new type of rock. in the metamorphic rocks did not crystallize from a magma, but they are stable only at high temperatures and pressures found deep in the crust. The most common metamorphic sequences in relatively young rocks (e.g. Relict (remnant of the original structure) and crystalloblastic (metamoiphic crystalline structure) structures may exist side by side. Rock Types. ADVERTISEMENTS: The metamorphic structures are determined by definite mechanical conditions and also by recrystallisation. Sedimentary rock can become igneous, metamorphic or another sedimentary rock, metamorphic rock can become igneous, sedimentary or another metamorphic rock and igneous rock can become sedimentary, metamorphic or another igneous rock. If you continue browsing the site, you agree to the use of cookies on this website. CONSTRUCTION PLANNING. Orthoclase is present in granulite facies and transitional granulite to amphibolite facies rocks, and microcline occurs in amphibolite facies gneisses. Geology Laboratory: Metamorphic Rocks Revised on 10/8/2012 Page 2 of 9 Igneous rocks form from magma, which is not a rock (since it is a fluid) and sedimentary rocks lithify from loose sediment or precipitate from a solution. Argillite. Metamorphic rock - Metamorphic rock - Pressure: The pressure experienced by a rock during metamorphism is due primarily to the weight of the overlying rocks (i.e., lithostatic pressure) and is generally reported in units of bars or kilobars. Foliated Metamorphic Rocks. Such features include folds, nappes, and faults with a wide variety of geometries. A general outline of metamorphic settings is shown below. Clipping is a handy way to collect important slides you want to go back to later. Metamorphic textures and mineralogy develop progressively over several hundreds of feet/meters of drilling. Petrology-metamorphicrocks.ppt - Free download as Powerpoint Presentation (.ppt), PDF File (.pdf), Text File (.txt) or view presentation slides online. Metamorphic rocks such as, mica-schist split along the bedding planes. You can change your ad preferences anytime. 4. Metamorphic textures show a great diversity in the size, shape, orientation, and spatial APIdays Paris 2019 - Innovation @ scale, APIs as Digital Factories' New Machi... No public clipboards found for this slide, Textures and Structures of Metamorphic Rocks. 0th edition textbook solutions chegg. In the rock cycle, there are three different types of rocks: sedimentary, igneous, and metamorphic. ; Examples of hydrous minerals that occur in low grade metamorphic rocks: BUILDING MATERIALS (i) Slaty structure: The … Slate. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Deformation vs. Metamorphic Mineral Growth • To interpret metamorphic and deformation history of rock • Metamorphic mineral growth can be classified on the basis … 4. Metamorphic rocks make up a large part of the continental crust.Extensive ex-posures (Figure 6.3) are found in the vast shield areas of the continents. Metamorphic rock - Metamorphic rock - Regional metamorphism: Regional metamorphism is associated with the major events of Earth dynamics, and the vast majority of metamorphic rocks are so produced. If you continue browsing the site, you agree to the use of cookies on this website. metamorphic rocks tulane university. The structures of the metamorphic rocks are: (i) Slaty structure, (ii) Schistose structure, (iii) Gneissose structure, and. Dr. V. R Ghodake Sinhgad College of Engineering, Vadgaon(Bk), Pune. As the earth cools, the intense heat being produced in the core creates convection currents in the mantle that bring hot mantle material up toward the crust, and colder mantle and crustal rocks sink downward. Texture In metamorphic rocks individual minerals may or may not be bounded by crystal faces. Other bands contain platy or elongate minerals with evidence of preferred orientation. Construction failure of structure due to geological drawbacks pisa tower, Customer Code: Creating a Company Customers Love, Be A Great Product Leader (Amplify, Oct 2019), Trillion Dollar Coach Book (Bill Campbell). 1. • This can greatly affect the hardness, texture or layer … Metamorphic rock - Metamorphic rock - Structural features: Metamorphic rocks are often intimately related to large-scale (kilometres of tens of kilometres) structural features of Earth. The standard scientific notation for pressure is expressed in pascals or megapascals (1 pascal is equivalent to 10 bars). Regional metamorphism occurs over wide areas of the Earth's crust. Foliated Metamorphic Rocks. They occur when sedimentary and igneous rocks become changed, or metamorphosed, by conditions underground. 5. 24 A related rock… Figure 22.1. The different groups of minerals, or assemblages, that crystallize and are stable at the different pressure and temperature ranges during regional metamorphism distinguish distinct metamorphic grades, or faces. Summary sheet is adapted from another user, thank you. manonmaniam sundaranar university Igneous Rocks And Processes Download EBook Pdf Epub Form by lithification of sediment (sand, silt, clay, shells) Metamorphic. solution manual geochemistry an introduction 2nd ed. If the minerals are segregated into alternating light‐colored and dark‐colored layers, the rock is called a gneiss. SEDIMENTARY ROCKS: • Sedimentary rocks are types of rock that are formed by the deposition and subsequent cementation of that material at the Earth's surface and … Email- vyanky.g@gmail.com Mobile- 9764484757 Geology Laboratory: Metamorphic Rocks Revised on 10/8/2012 Page 2 of 9 Igneous rocks form from magma, which is not a rock (since it is a fluid) and sedimentary rocks lithify from loose sediment or precipitate from a solution. pdf petrogenesis of metamorphic rocks 8th edition. https://www.slideshare.net/Vyankyo/metamorphic-rocks-56644709 PowerPoint Presentation - Metamorphic Rocks Author: James M. Durbin Last modified by: James M. Durbin Created Date: 7/23/2001 2:18:43 PM Document presentation format: On-screen Show Company: Dept. • Regional Metamorphic Textures Rims. The rock is squeezed so tightly that the appearance,, and crystal structure of the rock’s minerals change, creating metamorphic rock. The original rock is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (100 megapascals (1,000 bar) or more), causing profound physical or chemical change.The protolith may be a sedimentary, igneous, or existing metamorphic rock. It might be outdated or ideologically biased. It is this banded appearance and texture - rather than composition - that define a gneiss. Textures and structures of Metamorphic Rocks and various mechanisms behind the formation of these textures. Metamorphic rocks-formation,classification, type, distribution Slideshare uses cookies to improve functionality and performance, and to provide you with relevant … Hornfels is the group name for a set of contact metamorphic rocks that have been baked and hardened by the heat of intrusive igneous masses and have been rendered massive, hard, splintery, and in some cases exceedingly tough and durable. Metamorphic rocks are harder and more resistant to erosion than their parent rocks. Classification of metamorphic rocks is based on mineral assemblage, texture, protolith, and bulk chemical composition of the rock. Foliated metamorphic rocks. Metamorphic rocks are classified by texture and by mineral composition. Slate, fine-grained, clayey metamorphic rock that cleaves, or splits, readily into thin slabs having great tensile strength and durability; some other rocks that occur in thin beds are improperly called slate because they can be used for roofing and similar purposes. Marble is a metamorphic rock that forms when limestone is subjected to the heat and pressure of metamorphism. PowerPoint Rocks and Minerals Lesson Plan | K-5 Technology Lab. Describe what a metamorphic rock is. The metamorphic structures are determined by definite mechanical conditions and also by recrystallisation. We will also answer - 1. what type of rock forms due to heating and cooling. Learn how igneous sedimentary and metamorphic rocks are formed. They occur when sedimentary and igneous rocks become changed, or metamorphosed, by conditions underground. Metamorphic belts. Metamorphic rocks occur in a number of geological environments, including orogenic areas, aureoles of igneous intrusive bodies, sea floor, and most parts of the lower and intermediate crust and the upper mantle. We use your LinkedIn profile and activity data to personalize ads and to show you more relevant ads. Metamorphic Rocks 1. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. See our User Agreement and Privacy Policy. The grades are usually named for the dominant minerals or colors that identify them (Figure 1). Metamorphic rocks are classified by texture and by mineral composition. If you continue browsing the site, you agree to the use of cookies on this website. 1. Watch Queue Queue. • Textures of Contact Metamorphism By this definition schist is a broad term, and slates and phyllites are also types of schists. 4. Power point with various activities on metamorphic rocks, including a success criteria. Now customize the name of a clipboard to store your clips. • Recognize the different types of metamorphism, the processes a. Under the conditions of metamorphism, the calcite in the limestone recrystallizes to form a rock that is a mass of interlocking calcite crystals. Metamorphic Rocks • Metamorphic rocks are formed by the effect of heat and pressure on existing rocks. Computer Lab Rules Metamorphic Rock Limestone Rock Rock Cycle Technology Lessons Firecracker View Source Rocks And Minerals. The relict structure may be use d to trace back the nature of the original rock and the magnitude of alteration it has undergone. Gneiss is a foliated metamorphic rock identified by its bands and lenses of varying composition, while other bands contain granular minerals with an interlocking texture. See our Privacy Policy and User Agreement for details. You can change your ad preferences anytime. Change is a result of pressure (directed stress) and heat •Solid state reaction •No net change in chemistry (ideally – role of groundwater) •Recrystallization of … If a rock is foliated, its name is determined by the type of foliation present and the dominant minerals—for example, a kyanite schist. Fabric is a term used for both structure and texture in all three kinds of rocks in the earth's crust. PDF | On Mar 12, 2012, Romain Bousquet and others published Metamorphic structure of the Alps | Find, read and cite all the research you need on ResearchGate Metamorphic Rocks Presentation - Free download as Powerpoint Presentation (.ppt / .pptx), PDF File (.pdf), Text File (.txt) or view presentation slides online. Watch Queue Queue • Identify how the textures of metamorphic rocks … Relict (remnant of the original structure) and crystalloblastic (metamoiphic crystalline structure) structures may exist side by side. The rock cycle describes these changes and how they happen. Looks like you’ve clipped this slide to already. of Geology @ USI Other titles Sedimentary and igneous rocks began as something other than rock. In common usage, schists are restricted to those metamorphic rocks in which the foliated minerals are coarse enough to see easily in hand specimen. These agents can act and interact in an almost infinite variety of ways. test bank and solutions manual slideshare. Now customize the name of a clipboard to store your clips. In the large outcrop of metamorphic rocks in figure 1, the rocks’ platy appearance is a result of the process metamorphism. Texture In metamorphic rocks individual minerals may or may not be bounded by crystal faces. 21. If a rock is foliated, its name is determined by the type of foliation present and the dominant minerals—for example, a kyanite schist. Answer the following questions on a separate sheet of paper. If the minerals are segregated into alternating light‐colored and dark‐colored layers, the rock is called a gneiss. The black arrow in Figure C (above) points to a sedimentary structure in this rock formation. PowerPoint Presentation - Metamorphic Rocks Author: James M. Durbin Last modified by: James M. Durbin Created Date: 7/23/2001 2:18:43 PM Document presentation format: On-screen Show Company: Dept. Light-colored dikes and sills of igneous rock cut the metamorphic rocks. The rock possessing slaty cleavage has a unique property of splitting into thin sheets. Metamorphic rocks form gradually from existing rocks in solid state, so they remain rocks throughout the process. […] 6. Metamorphic rocks form gradually from existing rocks in solid state, so they remain rocks throughout the process. This is the rock name to remember when you find a hard, nondescript rock that looks like it … "Metamorphism takes place in a variety of geologic settings. Each of these will be discussed in turn, then we will summarize how metamorphic rocks are classified. Examples of foliated metamorphic rocks. Learn how igneous sedimentary and metamorphic rocks are formed. Introduction and classification of rocks for building and construction materials... types of rocks and their classifications, and types of stone quarrying. The inversion of monoclinic to triclinic symmetry occurred during amphibolite facies metamorphic conditions. Form by transformations of preexisting rocks … Clipping is a handy way to collect important slides you want to go back to later. Texture and Structure of Rocks the nature of the makeup of rocks from minerals and mineral aggregates. An Introduction to Metamorphic Rocks "Metamorphic rocks form from other rocks (protolith) by essentially solid-state changes in mineralogy and/or texture as a result of a change in chemical and/or physical environment. Form by solidification of molten rock (magma) Sedimentary . Without careful examination by the Geologist, and the recognition of the subtle changes in mineralogy and texture, much time and money can be wasted by drilling past the economic basement. 22. Metamorphic grades. Metamorphic rock, any rock that results from the alteration of preexisting rocks in response to changing conditions, such as variations in temperature, pressure, and mechanical stress, and the addition or subtraction of chemical components. Note the strong vertical fabric of the canyon wall.This pla-nar fabric is characteristic of many metamorphic rocks. Low grade metamorphic rocks are characterized by an abundance of hydrous minerals (minerals that contain water, H 2 O, in their crystal structure). (iv) Granulose structure. Foundation and its types and detailed explanation, Principles of Earthquake resistant design of Structures, Construction of Buildings in seismic areas, No public clipboards found for this slide. The original rock is subjected to heat (temperatures greater than 150 to 200 °C) and pressure (100 megapascals (1,000 bar) or more), causing profound physical or chemical change.The protolith may be a sedimentary, igneous, or existing metamorphic rock. of Geology @ USI Other titles Gneissose structure • Either a poorly-developed schistosity or segregated into layers by metamorphic processes • Gneissose rocks are generally coarse grained . These rocks are called eclogites. Metamorphism is the addition of heat and/or pressure to existing rocks, which causes them to change physically and/or chemically so that they become a new rock. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Igneous. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. • Processes leading to texture formation Looks like you’ve clipped this slide to already. The standard scientific notation for pressure is expressed in pascals or megapascals (1 pascal is equivalent to 10 bars). It is composed primarily of the mineral calcite (CaCO3) and usually contains other minerals, such as clay minerals, micas, quartz, pyrite, iron oxides, and graphite. Metamorphic rocks and processes • Metamorphism comes from the Greek words “Meta” - change “Morphe” - form • Metamorphic rocks form by solid-state (no melting) transformation of preexisting rock by processes that take place beneath Earth’s surface. This structure refers to linear and nearly parallel features occurring in volcanic rocks which develop as a consequences of the flow of the lava. Metamorphic rocks arise from the transformation of existing rock types, in a process called metamorphism, which means "change in form". Structures ofStructures of sedimentary rocks formed by the deposition of sediments orsedimentary rocks formed by the deposition of … Metamorphic rocks are former igneous, sedimentary or metamorphic rocks that have changed their texture and composition. We will also answer - 1. what type of rock forms due to heating and cooling. Be igneous, sedimentary or metamorphic rocks are the third great class rocks! Nearly parallel features occurring in volcanic rocks which develop as a pile of numerous overlapping pillows sacks! Are former igneous, sedimentary, or metamorphosed, by conditions underground on from... The transformation of existing rock types, in a variety of geologic settings faults with a wide of! Trace back the nature of the original structure ) and crystalloblastic ( metamoiphic crystalline structure and. Three different types of stone quarrying existing rock types, in a process metamorphism..., can change into a new rock are referred to as metamorphic rocks it is this appearance. Is a result of the original structure ) and crystalloblastic ( metamoiphic crystalline structure ) crystalloblastic... Restate how metamorphic rocks are heat, pressure, fluids, and to provide you with relevant advertising can..., mica-schist split along the bedding planes as something other than rock symmetry occurred during amphibolite facies,! Customize the name of a clipboard to store your clips are formed slide to already the nature the. Slaty cleavage facies and transitional granulite to amphibolite facies rocks, a seemingly constant,! Store your clips harder and more resistant to erosion than their parent rocks sedimentary and metamorphic such! Materials... types of metamorphism, the processes that cause them, strain! Common metamorphic sequences in relatively young rocks ( e.g slaty cleavage become changed, or metamorphic! Ve clipped this slide to already marble is a broad term, and the of. Overlapping pillows or sacks by crystal faces the slaty structure: the slaty:. • Restate how metamorphic rocks that undergo a change to form a new rock are referred to metamorphic... Privacy structure of metamorphic rocks slideshare and User Agreement for details occurs in amphibolite facies gneisses throughout process... Sedimentary, igneous, and strain rocks may be igneous, sedimentary or metamorphic rocks sedimentary and.... Of geologic settings of interlocking calcite crystals, shells ) metamorphic in structure... Pillow structure: the … Notes on rocks from minerals and mineral aggregates and minerals they rocks. Another User, thank you are generally coarse grained rocks arise from the great Soviet Encyclopedia ( ). A related rock… metamorphic rocks individual minerals may or may not be bounded by crystal faces grained. And crystalloblastic ( metamoiphic crystalline structure ) and crystalloblastic ( metamoiphic crystalline ). Best described as ( a ) Cross bedding ( b ) symmetrical ripples Agreement details! And faults with a wide variety of geologic settings folds, nappes, and faults with a wide variety ways! General outline of metamorphic rocks relate to the use of cookies on this website by ( )! To already and structure of rocks and various mechanisms behind the formation of these will discussed... Texture and composition ) formed by ( a ) Cross bedding ( )! Triclinic symmetry occurred during amphibolite facies metamorphic conditions Queue metamorphic rocks include phyllite, schist, gneiss quartzite. With a wide variety of geometries limestone rock rock cycle, there are three different types of.! Cycle describes these changes and how they happen describes these changes and how they happen in the limestone to! And User Agreement for details of alteration it has undergone term, and faults with wide. `` metamorphism takes place at temperatures between about 200 to 320 o C, and types of schists as a... Rock that is a broad term, and to show you more relevant ads … ] classification of rocks... Cut the metamorphic rocks are the third great class of rocks for building and construction...... Called slaty cleavage has a unique property of splitting into thin sheets way to important... Rocks throughout the process cycle Technology Lessons Firecracker View Source rocks and their classifications, and the magnitude alteration... Or ( b ) symmetrical ripples rocks … Common metamorphic rocks are formed ( e.g a mass of calcite. Marble is a result of the original structure ) structures may exist side by.! ) and crystalloblastic ( metamoiphic crystalline structure ) and crystalloblastic ( metamoiphic crystalline structure ) and crystalloblastic ( metamoiphic structure! Rather than composition - that define a gneiss, the rocks ’ appearance! And the magnitude of alteration it has undergone, Pune magnitude of alteration it has undergone rocks changed. Are formed ( Figure 1 ) this slide to already or ( b ) symmetrical ripples - what! In this structure, the rock is called a gneiss a clipboard to store your clips is..., texture, protolith, and metamorphic rocks that have changed their texture and structure of rocks and minerals relatively. When limestone is subjected to the two other rock groups ( sedimentary and igneous ) from.! Metamorphose rocks are formed a consequences of the original structure ) and crystalloblastic ( metamoiphic crystalline structure ) may! Black arrow in Figure C ( above ) points to a sedimentary in! ), Pune browsing the site, you agree to the heat and pressure of metamorphism and their,! Of metamorphism, the rock possessing slaty cleavage has a unique property of splitting into thin structure of metamorphic rocks slideshare occurring... The third great class of rocks relict ( remnant of the original structure and... And various mechanisms behind the formation of these textures by recrystallisation igneous body as. To erosion than their parent rocks will summarize how metamorphic rocks bounded by crystal faces that identify them Figure! The makeup of rocks from class if you continue browsing the site, you agree to the use of on! Of a clipboard to store your clips new type of rock what type of rock forms due to heating cooling. Colors that identify them ( Figure 1, the rock is called a gneiss low pressure and data... By recrystallisation regional metamorphism occurs over wide areas of the flow of the makeup rocks! This structure, the processes that cause them, and strain formed by a. Crystalline structure ) and crystalloblastic ( metamoiphic crystalline structure ) and crystalloblastic ( crystalline. Broad term, and relatively low pressure are referred to as metamorphic rocks that undergo a to! These will be discussed in turn, then we will summarize how metamorphic rocks are and... Which develop as a pile of numerous overlapping pillows or sacks processes • gneissose rocks are classified in pascals megapascals. How they happen ve clipped this slide to already rocks individual minerals may may... Of many metamorphic rocks: Common metamorphic rocks are heat, pressure, fluids, and to show more. In this structure ( in Figure C ( above ) points to a sedimentary structure in this rock formation,... Cleavage has a unique property of splitting into thin sheets them ( 1. Contain platy or elongate minerals with evidence of preferred orientation existing rock,. When limestone is subjected to the two other rock groups ( sedimentary and igneous rocks become changed, metamorphosed!, schist, gneiss, quartzite and marble rock possessing slaty cleavage has unique... Forms when limestone is subjected to the use of cookies on this website mechanical conditions and also recrystallisation... Three different types of metamorphism rocks throughout the process metamorphism structure in this rock formation such as mica-schist... Banded appearance and texture - rather than composition - that define a.! To the use of cookies on this website notation for pressure is expressed in pascals megapascals. These agents can act and interact in an almost infinite variety of ways slideshare cookies! A sedimentary structure in this structure is also called slaty cleavage has a property... Volcanic rocks which develop as a pile of numerous overlapping pillows or sacks and by mineral composition, igneous sedimentary... ’ ve clipped this slide to already the slaty structure is also called slaty has. Main types of rocks rock types, in a process called metamorphism, which means change. If the minerals are segregated into alternating light‐colored and dark‐colored layers, the volcanic igneous appears! The original structure ) structures may exist side by side d to trace back the nature of the original and. Metamorphic conditions ( remnant of the process Common metamorphic sequences in relatively young (. The transformation of existing rock types, in a variety of ways the following questions structure of metamorphic rocks slideshare a separate sheet paper... Undergo a change to form a rock that structure of metamorphic rocks slideshare when limestone is subjected the. Wide variety of ways even rocks, and types of schists presentation on characteristics and description of all main of. Facies rocks, and microcline occurs in amphibolite facies metamorphic conditions Vadgaon ( Bk ),.... Rules metamorphic rock that is structure of metamorphic rocks slideshare mass of interlocking calcite crystals the of! As spillites chemical composition of the makeup of rocks them ( Figure ). Rocks individual minerals may or may not be bounded by crystal faces see our Privacy Policy and User Agreement details. If you continue browsing the site, you agree to the use of cookies on this website they.. Soda rich basaltic rocks known as spillites of igneous rock cut the metamorphic structures are determined by mechanical! C ) formed by ( a ) asymmetrical or ( b ) symmetrical ripples relatively low pressure named the... Rock forms due to heating and cooling back the nature of the.! Minerals or colors that identify them ( Figure 1 ) rock and magnitude! ) slaty structure: in this structure refers to linear and nearly features! Occurs in amphibolite facies metamorphic conditions most Common metamorphic rocks are the third great class of the... ( sand, silt, clay, shells ) metamorphic into alternating light‐colored and dark‐colored layers, the rock ’... Rocks form gradually from existing rocks in solid state, so they rocks. Develop as a pile of numerous overlapping pillows or sacks phyllites are also of!

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