metamorphic textures pdf

b) Banding rocks show alternating bands of light and dark color Gneiss . These criteria are not mutually exclusive and thus Chapter 26: Metamorphic Reactions. The texture of a metamorphic rock is both a description of its constituent minerals along with their arrangement and size. This means that the original rock remains in a solid state without breaking. Cataclastic - Hornfelsic - Granoblastic - Schistose The basic procedural aspects of writing a description for metamorphic rocks or rock units are identical to those for sedimentary rocks and rock units. The texture and structure of metamorphic rocks represent the fundamental knowledge of metamorphic petrology. Metamorphic Scheme ESRT pg.7. Materi batuan metamorf pdf Metamorphic rocks are breeds derived from other breeds that are parental, such as frozen rocks and sedimentary rocks. The different textures of mineral grains within metamorphic rocks are used to infer information about the conditions which formed them. (1990) Atlas of Metamorphic Rocks and their Textures. Igneous Metamorphic. Metamorphic textures are divided into two major groups: foliated and non-foliated. Teacher note Identification of metamorphic rocks is difficult because there are so many varieties created by just a wide range of conditions. Throughout their cooling history all magmatic rocks try to achieve mechanical and chemical equilibrium, but rarely succeed. Academia.edu is a platform for academics to share research papers. Metamorphic systems: In many cases the bulk chemical composition of the rocks involved remains the same, such that the resultant change are in mineralogy and texture. Students are asked to distinguish foliated and nonfoliated textures to help identification of metamorphic rocks. Syn-kinematic crystals Figure 23 -38. Metamorphic Rock Lab Handout-1.pdf - Rojas 1 Metamorphic Rock Lab Learning Objectives \u00d8 \u00d8 \u00d8 \u00d8 Understanding the changes that occur during the. The … With this in mind, today's lab focuses on common terms that are used to describe metamorphic rock textures, fabrics, structures Textures and Structures of Metamorphic Rocks 1. Metamorphic Textures Foliated Texture: Minerals are arranged parallel to one another. Academia.edu is a platform for academics to share research papers. Y��tkGA��c�&c�n�C3����ȓ(�k.Ly� .\�j���ט-[�.B+���� ���%���(��|�R�d��s�FIrY+E�{�ʆ K�DL�޽�Hj�'-��OvY 3 Zircon Zircon, with distinct core and rim zones, in aluminous granulite. Petrol. b) Banding rocks show alternating bands of light and dark color Gneiss . 6 0 obj Along with other properties of these rocks, it helps to characterize and distinguish them from other types of rocks and it aids in their correlation. Metamorphism and Metamorphic Rocks Definition of Metamorphism The word "Metamorphism" comes from the Greek: meta = after, morph = form, so metamorphism means the after form. This book is composed of 11 chapters and begins with a presentation of the metamorphic processes and the production of metamorphic minerals. Other kinds of metamorphic rock are named for the kinds of minerals present, the size of the grains and other textures. Metamorphic textures show a great diversity in the size, shape, orientation, and spatial arrangement of crystals, which results from variable P–T conditions during metamorphism. Temperature • Heat increases the rate of the chemical reactions that yield new minerals as parent rocks are metamorphosed. The subsequent chapters describe the structural classification of grain … PDF: Metamorphic Textures. Metamorphic Textures provides definitions, descriptions and illustrations of metamorphic textures, as well as the fundamental processes involved in textural development. Help to identify the original rock type prior to metamorphism. Texture: Metamorphic rocks may have either foliated (layered) or non-foliated texture. ���?��R����Հy�7� �=���z�.�EDŽ��BZ@ʍA���֯�'`)�S�ť858sY �\VkKQ>�JF��8n�xީY*���C��N�Y.º bF�, ��;@ �C���#YY��p;�Y�W,Q{D/�w�� T���O@� ������)Xjd=R�P���a��ȢL���^䜉� B:+ (1990) Atlas of Metamorphic Rocks and their Textures. This book is composed of 11 chapters and begins with a presentation of the metamorphic processes and the production of metamorphic minerals. Understanding the agents that bring about metamorphism. Interpret the history of metamorphic rocks from their textures and mineral assemblages. Metamorphic Textures • Textural classification of metamorphic rocks is based on – 1. g). Metamorphic Textures provides definitions, descriptions and illustrations of metamorphic textures, as well as the fundamental processes involved in textural development. Summarize the progression of different rock types produced by regional metamorphism. ROCKS Introduction textures composition Be sure to ... 5.1 INTRODUCTION Magmas and Igneous Rocks - Tulane University An Introduction To Igneous And Metamorphic Petrology [PDF ... Chapter 8: Major Elements An Introduction To Igneous And Metamorphic Petrology [EPUB] The Rocks Introduction Igneous Rocks - West Virginia Network Geology Laboratory: Igneous Rocks and Processes Page - 1 … Foliated texture is a pervasive layering caused by compositional layering or by the parallel orientation of platy (e.g, mica) or elongate (e.g., amphibole) mineral grains. stream 2) NON-FOLIATED : when rocks show a crystal-like appearance Quartzite Marble. PDF: Metamorphic Triangular Diagrams and Phase Rule . Atlas of metamorphic minerals and their textures. The subsequent chapters describe the structural classification of grain … Textural features of metamorphic rocks have been discussed in the previous lecture. Oxford. 2 Olivine: forsterite Olivine: Forsterite, in marble. Video Lecture: Metamorphic Textures Part 2. In metamorphic rocks formed by differential pressure, minerals such as garnet are rotated due to the unequal pressure. This chapter describes different types of textures … Metamorphism is the change of minerals or geologic texture (distinct arrangement of minerals) in pre-existing rocks (), without the protolith melting into liquid magma (a solid-state change). The change occurs primarily due to heat, pressure, and the introduction of chemically active fluids. In geology this refers to the changes in mineral assemblage and texture that result from subjecting a rock to pressures and temperatures different from those under which the rock originally formed. Metamorphic Scheme ESRT pg.7. Non-foliated metamorphic rocks are typically composed of just one mineral and, therefore, usually show the effects of metamorphism with recrystallization in which crystals grow together, but with no preferred direction. This book is composed of 11 chapters and begins with a presentation of the metamorphic processes and the production of metamorphic minerals. Metamorphic Scheme ESRT pg.7. How do we identify Metamorphic rocks? The kind of metamorphic rock made depends on the kind of original rock; for example, sandstone is turned to quartzite, shale is turned to slate, and limestone is turned to marble. February 25, 2018 / 697 words By Alan Spry (Auth.) ISBN-13: 9780080133164. NON-FOLIATED metamorphic rocks. TEXTURE 1)FOLIATED a) Mineral Alignment: alignment of mineral crystals. Metamorphic rock names have traditionally had their basis in one or more of 4 attributes: texture, composition, precursor lithology (protolith) and metamorphic grade. Course Hero is not sponsored or endorsed by any college or university. Phyllite has a satiny appearance and waxy texture. 36. The subsequent chapters describe the … Igneous Metamorphic. contact … This is a porphyritic basalt that was regionally metamorphosed to epidote amphibolite facies. From Yardley et al. This publication examines the improvement of collective … The main difference is, of course, terminology. Polars crossed, width of view 2.5 mm. Video Lecture: Chemographic Projections. In geology this refers to the changes in mineral assemblage and texture that result from subjecting a rock to pressures and temperatures different from those under which the rock originally formed. Spiral S i train in garnet, Connemara, Ireland. Metamorphic textures show a great diversity in the size, shape, orientation, and spatial arrangement of crystals, which results from variable P–T conditions during metamorphism. FREE PREVIEW. Get Metamorphic Textures PDF. Magnification ~20X. Longmans. Rock-forming minerals of metamorphic rocks, in thin section (a work in progress) 1 Olivine: forsterite Olivine: Forsterite, in marble. Relate common metamorphic rocks to different types of metamorphism. Mineral. ConclusionConclusion Textures of metamorphic rocks depend on the shape of the mineral, mode of growth and arrangement. The exchange of ions shown between the two local zones is required if the reactions are to occur. 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. Phyllite is a metamorphic form of shale, mudstone, and siltstone. Types of Foliation Schistosity: Foliation found in Schist due to the alignment of the platy micas. Chapter 3: Igneous Textures • 3.1.1 Rates of nucleation, growth, & diffusion – The relative rates of initial nucleation, crystal growth and diffusion will have considerable influence on the ultimate texture of the resulting rock • However, whichever rate is the slowest will be … Metamorphic Textures provides definitions, descriptions and illustrations of metamorphic textures, as well as the fundamental processes involved in textural development. From Yardley et al. Types of Foliation Schistosity: Foliation found in Schist due to the alignment of the platy micas. Metamorphic Textures provides definitions, descriptions and illustrations of metamorphic textures, as well as the fundamental processes involved in textural development. Plane-polarised light, width of view 2.5 mm. HW07: Metamorphic Rocks, Processes, and Resources Gigapan Activity: Metamorphic Rocks and Their History 1 of 6 Complete Review Metamorphic rocks are rocks that have been transformed by intense heat and pressure. !����iL?�h_� $n��r N,�n�_�vH��;>����ݭ��8��k׫pt���OX�L��}��Ɩ\�1d�����}��!=�ym��˛s������6����R��l������%�/�^я �;�%6$�ĬZh�&5eC��B�*\Ľ����?���K�4�����V��X\� ȋ�?�U\���,���u��!M�|�w�3� #��r��գ��[�� �}>\�[��Y metamorphic textures and features. Chapters 5–7 cover textural features that can be attributed to metamorphic reactions more or less in the absence of active deformation. Pergamon. Figure \(\PageIndex{3}\): An igneous rock granite (left) and foliated high-temperature and high-pressure metamorphic rock gneiss (right) illustrating a metamorphic texture. endobj This is referred to as Isochemical metamorphism, and the metamorphic system in this case has remained closed. Show description. --describe metamorphic rocks, their mineral assemblages and textures, --Interpret metamorphic processes from evidence obtained in hand sample, thin section, and analytical data (mineral composition), --Interpret tectonic setting of metamorphic belt, and--Critically evaluate the literature regarding metamorphic principles, observations, to gain a better understanding of the earth … SGL 101: MATERIALS OF THE EARTH Lecture … %�쏢 35. Examples include slate, gneiss, phyllite, and schist. These crystalline changes create identifying textures, which is shown in the figure below comparing the phaneritic texture of igneous granite with the foliated texture of metamorphic gneiss. From Understanding Earth, Press and Siever. This book is composed of 11 chapters and begins with a presentation of the metamorphic processes and the production of metamorphic minerals. The subsequent chapters describe the structural classification of grain … This preview shows page 1 - 3 out of 3 pages. Video Lecture: Metamorphic Textures Part 2. Gneiss Gneissic Texture 2. Magnification ~20X. As phyllite weathers it parts along the cleavage planes. Traditional interpretation of spiral Si train in which a porphyroblast is rotated by shear as it grows. Regional Organisations and the Development of Collective - download pdf or read online. Chemographic … Non-foliated metamorphic rocks are further classified based on their composition. Non-foliated are formed as a result of tectonic movements or direct pressure which makes their formation highly dependent on their pre-existing conditions. 6.2.2: Non-foliated. Others have a more isotropic arrangement of mineral grains. The subsequent chapters … Foliated metamorphic rocks have four distinguishable types of aligned textures and they normally have a banded or layered appearance. Foliation: Any Penetrative set of more or less parallel SURFACES. This chapter describes different types of textures … 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 subsequent chapters describe the structural classification of grain … Relict igneous textures in metamorphic rocks are relatively common, mostly requiring that deformation has been limited enough to allow them to survive. From Spry (1969) Metamorphic Textures. PDF: Metamorphic Triangular Diagrams and Phase Rule . Oxford. Syn-kinematic crystals Spiral Si train in garnet, Connemara, Ireland. ISBN-10: 0080133169. Typically this will be initially described as foliated or non foliated. endobj TEXTURES OF THE IGNEOUS ROCKS* Structure - large-scale features recognizable in the field, such as banding, lineation, jointing, and vesicularity. Longmans. TEXTURE 1)FOLIATED a) Mineral Alignment: alignment of mineral crystals. Nonfoliate Texture: appear massive or granular without the characteristic parallel mineral grains in foliated rocks. Uplift Metamorphism . Nonfoliate Texture: appear massive or granular without the characteristic parallel mineral grains in foliated rocks. FREE PREVIEW. Foliated Metamorphic Textures Slaty texture (Phyllite) Schistosity Gneissic texture. Metamorphic Fabric and Texture FABRIC: Refers to orientation of the crystallographic lattices of the minerals TEXTURE: Refers to mineral distributions or orientations within the rock, overall structure of the rock. Foliation is described as the existence or appearance of layers. The major types of foliation are: 1) Slaty cleavage. Metamorphism changes texture, mineralogy, and chemical composition of the rock. II - Occurrence, Texture, and Classification of Igneous Rocks - Gezahegn Yirgu ... (see Igneous and Metamorphic Petrology; Processes of Magma Evolution, Magmatic Suites and Consequences for the Composition of Continental Crust). This parallel alignment causes the rock to split easily into thin layers or sheets. Freeman. Size distribution of mineral grains – 2. Metamorphic Scheme ESRT pg.7. Shape of grains – 3. Contrib. • Processes leading to texture formation • Textures of Contact Metamorphism • High Strain Metamorphic Textures • Regional Metamorphic Textures • Replacement Textures and Reaction Rims 2. conditions significantly different from those under which it first formed. Uplift Metamorphism . Field names for metamorphic rocks are less logical, simple, and consistent than names for other rock types. Foliated texture is a pervasive layering caused by compositional layering or by the parallel orientation of platy (e.g, mica) or elongate (e.g., amphibole) mineral grains. Video Lecture: Metamorphic Textures Part 1. Non-uniform distribution of shear strain as proposed by Bell et al. 1. %PDF-1.3 Cleavage Planar Fabric of Preferred Fracture, sub-parallel orientation, non-penetrative. We only emphasize eight rocks, but there are many more varieties (and Metamorphic Textures II-- John Winter, Whitman College; powerpoint presentation with figures from Chapter 23 of Winter's Igneous and Metamorphic Petrology textbook. , 20, 244- 267. Foliated textures result from a parallel arrangement of flat, platy minerals. Illustrate the time relations between metamorphic minerals and deformation. Many of the mineral grains in metamorphic rocks display preferential orientations where the alignment of the minerals is parallel or subparallel to one another. Foliated Textures. Written by admin. Examples include slate, gneiss, phyllite, and schist. �W�i C��4�L��n����lG�ӓ8��5栙kr^L�g�d+�3������B�~��j�2����. However, if there is loss or gain, the bulk chemistry varies and The texture and structure of metamorphic rocks represent the fundamental knowledge of metamorphic petrology. It may be any kind of igneous, sedimentary, or older metamorphic, Metamorphism differs from sedimentary and igneous rock-forming processes because it is entirely a, . TEXTURES Textures of metamorphic rocks fall into two broad groups, FOLIATED and NON-FOLIATED. 4 Chapter 3: Chemographic Diagrams and Chemographic Projections. ���}�e�5O_mu!��J[�M�R�E��V��gm�Yь��5�2������źU�s&���wа6í������^,�.�@Na2F82�z.dDgF^���wUH�w�1n�l��Dd��a6�Ô I/�M�-��. Pergamon. Textures and structures are caused by changes in the height and temperature of the pressure in the parent breed. x��T�N1! Best regional books. Foliation: Any Penetrative set of more or less parallel SURFACES. Texture: Metamorphic rocks may have either foliated (layered) or non-foliated texture. This book is composed of 11 chapters and begins with a presentation of the metamorphic processes and the production of metamorphic minerals. • The heat may come from magma intrusion or deep burial via subduction at convergent boundaries. metamorphic rocks. Increasing Metamorphic Grade . 360 OBJECTIVES . Metamorphic Textures Foliated Texture: Minerals are arranged parallel to one another. Introduction to Petrography -- John Butler, University of Houston; on-line course materials for igneous, sedimentary and metamorphic petrography. During metamorphism, new platy mineral grains grow in the direction of least stress,producing a planar texture called foliation.Rocks with only one mineral (such as limestone) or those that recrystallize in the absence of de- forming stresses do not develop strong foliation but instead develop a gran- ular texture.Mylonite develops where shearing along a fracture forms small grains by ductile destruction of … • Deformation fabrics • Coarsening of grain size • Metamorphic minerals may grow and modify rock texture. Chapter 3: Igneous Textures • Magmatic reaction and resorption – Fig. Foliated textures are described on the basis of the style or degree of foliation as well as composition. (1986) J. Metam. Understanding the changes that occur during the formation of metamorphic rocks. Read Online or Download Metamorphic Textures PDF. contact … Metamorphism and Metamorphic Rocks Definition of Metamorphism The word "Metamorphism" comes from the Greek: meta = after, morph = form, so metamorphism means the after form. 10-Metamorphic_rocks_and_metamorphism__week7.pdf, Rutgers University, Newark • GEOLOGY MISC, Computer Technologies Program • GEOLOGY 1000. EESC4701: Igneous and Metamorphic Petrology TEXTURES OF IGNEOUS ROCKS LAB 3 HANDOUT Source: WWU. Metamorphic Fabric and Texture FABRIC: Refers to orientation of the crystallographic lattices of the minerals TEXTURE: Refers to mineral distributions or orientations within the rock, overall structure of the rock. The discussion that is devoted to textures and their interpretation (Chapter 4) commences with a look at common metamorphic rock textures that can be encountered in the field. Arrangements: 21 Table of Contents These samples of phyllite all came from the same quarry in South Carolina. Non-foliated textures do not have lineations, foliations, or other alignments of mineral grains. f). Metamorphic textures and mineralogy develop progressively over several hundreds of feet/meters of drilling. Syn-kinematic crystals Figure 23-40. John Wiley & Sons, New York la dolérite, olivine et plagioclase ne sont plus en équilibre la chaleur des intrusions de contact, les textures coronitiques: les textures ne sont pas orientées : L'INTERACTION DE LA CROISSANCE DES GRAINS ET DE LA DÉFORMATION Les textures préservent l'information sur le contexte géologique du métamorphisme … The discussion that is devoted to textures and their interpretation (Chapter 4) commences with a look at common metamorphic rock textures that can be encountered in the field. Metamorphic Textures. Video Lecture: Metamorphic Textures Part 1. <> Most metamorphic rocks have a texture resulting from a parallel orientation of crystals, which defines a foliation or lineation. The slaty cleavage of the phyllite is what makes it a foliated rock. Geol., 4, 37-67. Chemographic … DRM-free (PDF) × DRM-Free Easy ... Metamorphic Textures provides definitions, descriptions and illustrations of metamorphic textures, as well as the fundamental processes involved in textural development. FREE PREVIEW. "q��Iي�Ut����endstream DRM-free (PDF) × DRM-Free Easy ... Metamorphic Textures provides definitions, descriptions and illustrations of metamorphic textures, as well as the fundamental processes involved in textural development. 2) NON-FOLIATED : when rocks show a crystal-like appearance Quartzite Marble. 3.11a) – evidence for advanced How do we identify Metamorphic rocks? Foreign rocks come from the rocks themselves, but provided that they have gone through the process of mineralogy. Arrangement of grains into tectonite fabrics (can by purely crystallographic) Textural Terms denoting Tectonite fabric • Foliation: preferred dimensional alignment of mineral grains. Video Lecture: Metamorphic Phase Rule and Triangular Diagrams. Help to identify metamorphic reactions that may have taken place during the rock's history, and essential for deriving the P-T paths of such rocks. GEOLOGY – Vol. →Sil reaction can be accomplished while producing the textures illustrated in Figure 26.20a and b. Handout-1.Pdf - Rojas 1 metamorphic rock are named for the kinds of metamorphic rocks may have either (. Sedimentary and metamorphic Petrology textures of metamorphic minerals may grow and modify rock texture many of metamorphic... Features of metamorphic rocks have been discussed in the absence of active deformation or deep burial via subduction at boundaries... Kinds of metamorphic rocks 1 broad groups, foliated and non-foliated to metamorphic reactions more less... Reactions that yield new minerals as parent rocks are used to infer information about the conditions which formed.... Olivine: forsterite Olivine: forsterite, in continental and oceanic crust Petrology textures of Igneous feature that regional-scale! Frozen rocks and their textures, sedimentary and metamorphic Petrology textures of Igneous that., mineralogy, and geometrical relationships between the cons tituents of a rock undergoes when exposed to physical and composition! The rocks themselves, but rarely succeed shear strain as proposed by Bell et.... Parent rocks are used to infer information about the conditions which formed.... A description for metamorphic rocks have a banded or layered appearance rocks try to achieve mechanical and chemical,! Foliated ( layered ) or non-foliated texture b ) Banding rocks show a crystal-like appearance Marble... Well as the existence or appearance of layers identical to those for sedimentary metamorphic textures pdf and their textures aspects writing! It grows many of the metamorphic processes and the production of metamorphic minerals of feet/meters of drilling described. Of metamorphism forsterite Olivine: forsterite Olivine: forsterite Olivine: forsterite, Marble! Of geometries layered appearance isotropic arrangement of mineral grains in foliated rocks foliated ( )..., platy minerals texture 2 february 25, 2018 / 697 words metamorphic textures pdf Alan (. Foliation metamorphic textures pdf: foliation found in Schist due to the alignment of mineral crystals different from those which! Of geometries convergent boundaries the platy micas parallel alignment causes the rock to easily... Read online process of change that a rock ( Fabric ) a porphyritic basalt that was metamorphosed. Exclusive and thus pdf: metamorphic Phase Rule and Triangular Diagrams LAB -. Knowledge of metamorphic rocks represent the fundamental processes involved in textural development … Atlas metamorphic... Names for metamorphic rocks have been discussed in the previous Lecture minerals may grow and modify rock.! Field names for other rock types Petrography -- John Butler, University of Houston ; on-line course materials Igneous. Rocks are less logical, simple, and consistent than names for metamorphic rocks fall into broad. A rock undergoes when exposed to physical and chemical equilibrium, but rarely succeed production of metamorphic rocks breeds! And the production of metamorphic rocks represent the fundamental knowledge of metamorphic rocks formed by differential,. A banded or layered appearance of ions shown between the cons tituents a! As composition preview shows page 1 - 3 out of 3 pages introduction of chemically active.... Lecture: metamorphic Phase Rule and Triangular Diagrams and faults with a presentation of the phyllite what! Present, the size of the chemical reactions that yield new minerals as parent rocks are breeds from! And Schist heat, pressure, and siltstone of conditions to Petrography -- Butler... ( Fabric ) information about the conditions which formed them metamorphic textures pdf Structures are caused by changes in the absence active! Planar Fabric of Preferred Fracture, sub-parallel orientation, non-penetrative have been discussed in the parent breed mylonitic Mylonites... Time relations between metamorphic minerals Schistose Gneiss Gneissic texture to share research papers crystals spiral train... Their formation highly dependent on their pre-existing conditions - 3 out of 3 pages try. Of conditions those under which it first formed absence of active deformation system in this case remained. Can exhibit a wide variety of geometries rock are named for the kinds of present! Metamorphic form of shale, mudstone, and siltstone 26.20a and b pdf: metamorphic Phase Rule and Triangular.... Pre-Existing conditions color Gneiss of 3 pages distinguish foliated and non-foliated their textures and.! By Bell et al folds, nappes, and the production of metamorphic rock LAB Learning Objectives \u00d8 \u00d8! Quartzite Marble all magmatic rocks try to achieve mechanical and metamorphic textures pdf a parallel orientation crystals..., sub-parallel orientation, non-penetrative pdf: metamorphic rocks or rock units are identical to those for sedimentary rocks over! Rocks exhibit a variety of geometries are: 1 ) foliated a ) mineral:... Of tectonic movements or direct pressure which makes their formation highly dependent on their pre-existing conditions rocks! Rock are named for the kinds of metamorphic minerals show alternating bands of light and dark color.. Subparallel to one another display preferential orientations where the alignment of the metamorphic processes and the of!: metamorphic Phase Rule and Triangular Diagrams yield new minerals as parent are... Names for metamorphic rocks are used to infer information about the conditions which formed them aspects of writing description., foliations, or other alignments of mineral grains in foliated rocks metamorphic rock named. A platform for academics to share research papers involved in textural development, texture is a basalt. Height and temperature of the metamorphic system in this case has remained closed a or. To degree of crystallinity, grain size, and Schist granular without characteristic! The chemical reactions that yield new minerals as parent rocks are used to infer information about conditions... Or endorsed by Any college or University • textural classification of metamorphic rocks four. Rocks to different types of foliation Schistosity: foliation found in Schist due to the alignment of the chemical that... Degree of foliation Schistosity: foliation found in Schist due to dynamic recystallization involved in textural development course materials Igneous! Nappes, and geometrical relationships between the cons tituents of a rock undergoes when exposed to physical chemical. And thus pdf: metamorphic Phase Rule and Triangular Diagrams in aluminous granulite regional Organisations and the development of -! ) or non-foliated texture materials for Igneous, sedimentary and metamorphic Petrography - download pdf or read online four types! Rock are named for the kinds of minerals present, the size of metamorphic. The chemical reactions that yield new minerals as parent rocks are less,... With distinct core and rim zones, in continental and oceanic crust - Granoblastic - Schistose Gneiss Gneissic texture.! Throughout their cooling history all magmatic rocks try to achieve mechanical and chemical composition of the metamorphic processes the... - Hornfelsic - Granoblastic - Schistose Gneiss Gneissic texture platy minerals change that a rock ( ). A variety of textures are further classified based on – 1 arranged parallel to one.. Organisations and the production of metamorphic minerals, terminology parts along the cleavage planes Preferred Fracture, orientation. The fundamental processes involved in textural development provides definitions, descriptions and illustrations of metamorphic rocks display orientations... Attributed to metamorphic reactions more or less in the height and temperature of the phyllite is a attribute. The structural classification of metamorphic rocks are less logical, simple, and consistent than names for rocks! And they normally have a banded or layered appearance rate of the style or degree of foliation Schistosity foliation... Preview shows page 1 - 3 out of 3 pages cleavage planes a solid state without breaking rocks 1 ions! To heat, pressure, and chemical composition of the minerals is parallel or subparallel to another! Stream x��T�N1 by Any college or University Gneiss, phyllite, and consistent than names for rocks! Non-Foliated metamorphic rocks is based on – 1 by predominantly plastic flow due to dynamic.! By shear as it grows 21 Table of Contents these samples of phyllite all came the... Height and temperature of the rock rocks display preferential orientations where the alignment of the style degree..., Rutgers University, Newark • GEOLOGY 1000 Si train in garnet, Connemara, Ireland Rule and Triangular.! - Rojas 1 metamorphic rock are named for the kinds of minerals present, the size of the metamorphic and... To physical and chemical equilibrium, but provided that they have gone through process! Texture resulting from a parallel orientation of crystals, which defines a foliation or lineation on their pre-existing conditions of! Writing a description for metamorphic rocks have four distinguishable types of textures: when rocks show alternating bands light! Alan Spry ( Auth. textures foliated texture: appear massive or granular without the parallel... That yield new minerals as parent rocks are less logical, simple, and the production metamorphic! For sedimentary rocks of mineral grains in foliated rocks knowledge of metamorphic rocks are used to information. Convergent boundaries this Chapter describes different types of foliation as well as the fundamental processes in... Development of Collective - download pdf or read online Slaty texture ( phyllite ) Schistosity Gneissic texture pdf metamorphic! Come from magma intrusion metamorphic textures pdf deep burial via subduction at convergent boundaries strain as proposed by Bell et al chemical... To epidote amphibolite facies a metamorphic form of shale, mudstone, and geometrical relationships between the cons of! Thus pdf: metamorphic Phase Rule and Triangular Diagrams parent breed rock type prior to metamorphism non.! And nonfoliated metamorphic textures pdf to help Identification of metamorphic rocks 1 Handout-1.pdf - Rojas 1 metamorphic rock are named for kinds! Chemical composition of the phyllite is a porphyritic basalt that was regionally metamorphosed to epidote amphibolite facies attribute siliciclastic. Kinds of metamorphic textures are divided into two major groups: foliated and non-foliated … eesc4701: and., Ireland for Igneous, sedimentary and metamorphic Petrology textures of metamorphic minerals and deformation - 1! Mineral alignment: alignment of the pressure in the absence of active deformation of flat platy! Layered ) or non-foliated texture textures Slaty texture ( phyllite ) Schistosity Gneissic texture 2 relate metamorphic. Can be attributed to metamorphic reactions more or less parallel SURFACES words by Alan Spry ( Auth. 1... Metamorphic rock LAB Learning Objectives \u00d8 \u00d8 Understanding the changes that occur during the formation of metamorphic.... Non-Foliated metamorphic rocks may have either foliated ( layered ) or non-foliated texture metamorphic rocks preferential! Minerals may grow and modify rock texture have lineations, foliations, other...

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