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ATLAS OF METAMORPHIC ROCKS AND THEIR TEXTURES PDF

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Atlas of metamorphic rocks and their textures. Dubán Marín. Loading Preview. Sorry, preview is currently unavailable. You can download the paper by clicking. , English, Book, Illustrated edition: Atlas of metamorphic rocks and their textures / B.W.D. Yardley, W.S. MacKenzie, and C. Guilford. Yardley, B. W. D. First published: March musicmarkup.info About. Figures; Related; Information. ePDF PDF. PDF · ePDF PDF · PDF. Tools.


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This content was uploaded by our users and we assume good faith they have the permission to share this book. If you own the copyright to this book and it is. Atlas of Metamorphic Rocks and Their Textures. Book Reviews multiple intrusive events, several phases ofductile deformation, partial melting, and. Atlas of Igneous Rocks and Their Textures. Uploaded by. FIGALLOLIZANOFRANK · Principles of Metamorphic Petrology - Ron Vernon pdf. Uploaded by.

Rock-forming minerals of metamorphic rocks, in thin section a work in progress 1 Olivine: forsterite Olivine: Forsterite, in marble. Plane-polarised light, width of view 2. Polars crossed, width of view 2. Plane-polarised light, width of view 0. Polars crossed, width of view 0. Plane-polarised light, width of view 1 mm. Polars crossed, width of view 1 mm.

Their rocks of and atlas textures pdf metamorphic

Plane-polarised light, field of view 1 mm 64 Diopside Pyroxene: diopside, in calc-silicate marble. Polars crossed, field of view 1 mm 65 Enstatite Pyroxene: enstatite pale pinks and greens with olivine colourless, upper right and pale olive hornblende, in granulite-facies ultrabasic gneiss.

Plane-polarised light, field of view 5 mm 66 Enstatite Pyroxene: enstatite first-order colours with olivine high colours, upper right , in granulite-facies ultrabasic gneiss. Polars crossed, field of view 5 mm 67 Enstatite Pyroxene: aluminous enstatite, poikiloblast in granulite-facies cordierite gneiss.

Atlas of Metamorphic Rocks and Their Textures - PDF Free Download

Plane-polarised light, width of view 19 mm 68 Jadeite Pyroxene: jadeite altered at rim and in fractures in eclogite-facies meta-granite. Plane-polarised light, field of view 4 mm 81 Hornblende Amphibole: blue-green hornblende, in garnet-grade metagabbro.

Note low-order interference colours, partly masked by body colour. Polars crossed, field of view 4 mm 82 Hornblende Amphibole: hornblende, in foliated amphibolite. Plane-polarised light, field of view 2 mm 83 Hornblende Amphibole: hornblende, in amphibolite derived from gabbro.

Plane-polarised light, field of view 2 mm 84 Hornblende Amphibole: brown hornblende in high-temperature amphibolite. Note greenish rims resulting from retrograde change. Plane-polarised light, field of view 4 mm 85 Anthophyllite Amphibole: anthophyllite, in contact-metamorphosed rock.

Atlas of Metamorphic Rocks and Their Textures

Plane-polarised light, field of view 2 mm 86 Anthophyllite Amphibole: anthophyllite, in contact-metamorphosed rock. Polars crossed, field of view 2 mm 87 Gedrite Amphibole: gedrite Na-Al anthophyllite , in cordierite-gedrite gneiss.

Rocks and atlas of pdf metamorphic their textures

Plane-polarised light, field of view 6 mm 88 Gedrite Amphibole: gedrite Na-Al anthophyllite , in cordierite-gedrite gneiss. Polars crossed, field of view 6 mm 89 Glaucophane Amphibole: glaucophane, in blueschist.

Plane-polarised light, prisms parallel to polariser. Plane-polarised light, prisms normal to polariser. Plane-polarised light, field of view 6 mm 95 Muscovite Muscovite bright colours , with biotite, garnet and kyanite in schist.

Polars crossed, field of view 6 mm 96 Muscovite Muscovite, in phyllite. Plane-polarised light, field of view 1 mm 99 Muscovite phengite Muscovite var. Central grain will give a uniaxial figure 3T polytype. Polars crossed, field of view 1 mm Biotite Biotite, poikiloblast in biotite-grade schist greenschist facies. For instance, starting with a mudstone , the following sequence develops with increasing temperature: slate is a very fine-grained, foliated metamorphic rock, characteristic of very low grade metamorphism, while phyllite is fine-grained and found in areas of low grade metamorphism, schist is medium to coarse-grained and found in areas of medium grade metamorphism, and gneiss coarse to very coarse-grained, found in areas of high-grade metamorphism.

Another important mechanism of metamorphism is that of chemical reactions that occur between minerals without them melting. In the process atoms are exchanged between the minerals, and thus new minerals are formed.

Many complex high-temperature reactions may take place, and each mineral assemblage produced provides us with a clue as to the temperatures and pressures at the time of metamorphism. Metasomatism is the drastic change in the bulk chemical composition of a rock that often occurs during the processes of metamorphism. It is due to the introduction of chemicals from other surrounding rocks. Water may transport these chemicals rapidly over great distances.

Because of the role played by water, metamorphic rocks generally contain many elements absent from the original rock, and lack some that originally were present. Still, the introduction of new chemicals is not necessary for recrystallization to occur. Types of metamorphism Contact metamorphism A contact metamorphic rock made of interlayered calcite and serpentine from the Precambrian of Canada.

Scale in mm. Contact metamorphism is the name given to the changes that take place when magma is injected into the surrounding solid rock country rock. The changes that occur are greatest wherever the magma comes into contact with the rock because the temperatures are highest at this boundary and decrease with distance from it.

Rocks metamorphic their and pdf textures atlas of

Around the igneous rock that forms from the cooling magma is a metamorphosed zone called a contact metamorphism aureole. Aureoles may show all degrees of metamorphism from the contact area to unmetamorphosed unchanged country rock some distance away. The formation of important ore minerals may occur by the process of metasomatism at or near the contact zone.

When a rock is contact altered by an igneous intrusion it very frequently becomes more indurated, and more coarsely crystalline.

Many altered rocks of this type were formerly called hornstones, and the term hornfels is often used by geologists to signify those fine grained, compact, non-foliated products of contact metamorphism.

Atlas of Metamorphic Rocks and Their Textures_Yardley

A shale may become a dark argillaceous hornfels, full of tiny plates of brownish biotite ; a marl or impure limestone may change to a grey, yellow or greenish lime-silicate-hornfels or siliceous marble , tough and splintery, with abundant augite , garnet , wollastonite and other minerals in which calcite is an important component.

A diabase or andesite may become a diabase hornfels or andesite hornfels with development of new hornblende and biotite and a partial recrystallization of the original feldspar. Chert or flint may become a finely crystalline quartz rock; sandstones lose their clastic structure and are converted into a mosaic of small close-fitting grains of quartz [4] in a metamorphic rock called quartzite.

If the rock was originally banded or foliated as, for example, a laminated sandstone or a foliated calc- schist this character may not be obliterated, and a banded hornfels is the product; fossils even may have their shapes preserved, though entirely recrystallized, and in many contact-altered lavas the vesicles are still visible, though their contents have usually entered into new combinations to form minerals that were not originally present.

Textures pdf atlas metamorphic their rocks of and

The minute structures, however, disappear, often completely, if the thermal alteration is very profound. Thus small grains of quartz in a shale are lost or blend with the surrounding particles of clay, and the fine ground-mass of lavas is entirely reconstructed. It fluctuates Topic Pages contain an overview, definitions, biographies, related topics, images, plus links to relevant articles and other content provided by your library.

Topic soil surface layer of the earth, composed of fine rock material disintegrated by geological processes; and humus , the organic remains of decomposed Topic Pages contain an overview, definitions, biographies, related topics, images, plus links to relevant articles and other content provided by your library. Topic Seismic waves Energy wave generated by an earthquake or an artificial explosion.

There are two types of seismic waves: body waves that travel through the Earth's Topic Pages contain an overview, definitions, biographies, related topics, images, plus links to relevant articles and other content provided by your library. Topic sediment mineral or organic particles that are deposited by the action of wind, water, or glacial ice.

PDF Download Petrography of Igneous Metamorphic Rocks PDF Online

These sediments can eventually form sedimentary rocks Topic Pages contain an overview, definitions, biographies, related topics, images, plus links to relevant articles and other content provided by your library. Topic Ocean interconnected mass of saltwater covering It is subdivided into four or five major Topic Pages contain an overview, definitions, biographies, related topics, images, plus links to relevant articles and other content provided by your library.

Topic Weathering Breakdown and chemical disintegration of rocks and minerals at the Earth's surface by physical and chemical processes.